66670997040 has 240 divisors, whose sum is σ = 225586284768. Its totient is φ = 17645912064.

The previous prime is 66670997027. The next prime is 66670997083. The reversal of 66670997040 is 4079907666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70401847 + ... + 70402793.

Almost surely, 2^66670997040 is an apocalyptic number.

66670997040 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 66670997040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112793142384).

66670997040 is an abundant number, since it is smaller than the sum of its proper divisors (158915287728).

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

66670997040 is a wasteful number, since it uses less digits than its factorization.

66670997040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 66670997040 in words is "sixty-six billion, six hundred seventy million, nine hundred ninety-seven thousand, forty".