670538661388440 has 256 divisors, whose sum is σ = 2168028761472000. Its totient is φ = 164928234240000.

The previous prime is 670538661388417. The next prime is 670538661388447. The reversal of 670538661388440 is 44883166835076.

It is a super-2 number, since 2×670538661388440² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670538661388447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16700402365 + ... + 16700442515.

It is an arithmetic number, because the mean of its divisors is an integer number (8468862349500).

Almost surely, 2^{670538661388440} is an apocalyptic number.

670538661388440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670538661388440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084014380736000).

670538661388440 is an abundant number, since it is smaller than the sum of its proper divisors (1497490100083560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670538661388440 is a wasteful number, since it uses less digits than its factorization.

670538661388440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48178 (or 48174 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 69.

The spelling of 670538661388440 in words is "six hundred seventy trillion, five hundred thirty-eight billion, six hundred sixty-one million, three hundred eighty-eight thousand, four hundred forty".