165660156663 has 8 divisors (see below), whose sum is σ = 220904982000. Its totient is φ = 110427717888.

The previous prime is 165660156643. The next prime is 165660156677. The reversal of 165660156663 is 366651066561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165660156663 - 2⁵ = 165660156631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165660156643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3065388 + ... + 3118961.

It is an arithmetic number, because the mean of its divisors is an integer number (27613122750).

Almost surely, 2^165660156663 is an apocalyptic number.

165660156663 is a deficient number, since it is larger than the sum of its proper divisors (55244825337).

165660156663 is an equidigital number, since it uses as much as digits as its factorization.

165660156663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193281.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 165660156663 in words is "one hundred sixty-five billion, six hundred sixty million, one hundred fifty-six thousand, six hundred sixty-three".