667616250655662 has 128 divisors (see below), whose sum is σ = 1673464347426816. Its totient is φ = 172494480720000.

The previous prime is 667616250655633. The next prime is 667616250655703. The reversal of 667616250655662 is 266556052616766.

It is a super-2 number, since 2×667616250655662² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4710375337 + ... + 4710517067.

It is an arithmetic number, because the mean of its divisors is an integer number (13073940214272).

Almost surely, 2^{667616250655662} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667616250655662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (836732173713408).

667616250655662 is an abundant number, since it is smaller than the sum of its proper divisors (1005848096771154).

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

667616250655662 is a wasteful number, since it uses less digits than its factorization.

667616250655662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195326.

The product of its (nonzero) digits is 979776000, while the sum is 69.

The spelling of 667616250655662 in words is "six hundred sixty-seven trillion, six hundred sixteen billion, two hundred fifty million, six hundred fifty-five thousand, six hundred sixty-two".