320666157757608 has 64 divisors (see below), whose sum is σ = 863391315024000. Its totient is φ = 98659727013120.

The previous prime is 320666157757607. The next prime is 320666157757639. The reversal of 320666157757608 is 806757751666023.

It is not an unprimeable number, because it can be changed into a prime (320666157757607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30781908 + ... + 39860483.

It is an arithmetic number, because the mean of its divisors is an integer number (13490489297250).

Almost surely, 2^{320666157757608} is an apocalyptic number.

It is an amenable number.

320666157757608 is an abundant number, since it is smaller than the sum of its proper divisors (542725157266392).

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

320666157757608 is a wasteful number, since it uses less digits than its factorization.

320666157757608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70656962 (or 70656958 counting only the distinct ones).

The product of its (nonzero) digits is 533433600, while the sum is 69.

The spelling of 320666157757608 in words is "three hundred twenty trillion, six hundred sixty-six billion, one hundred fifty-seven million, seven hundred fifty-seven thousand, six hundred eight".