165650775566 has 8 divisors (see below), whose sum is σ = 248478126600. Its totient is φ = 82824733368.

The previous prime is 165650775551. The next prime is 165650775581. The reversal of 165650775566 is 665577056561.

It is an interprime number because it is at equal distance from previous prime (165650775551) and next prime (165650775581).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101585 + ... + 584483.

It is an arithmetic number, because the mean of its divisors is an integer number (31059765825).

Almost surely, 2^165650775566 is an apocalyptic number.

165650775566 is a deficient number, since it is larger than the sum of its proper divisors (82827351034).

165650775566 is a wasteful number, since it uses less digits than its factorization.

165650775566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654418.

The product of its (nonzero) digits is 39690000, while the sum is 59.

The spelling of 165650775566 in words is "one hundred sixty-five billion, six hundred fifty million, seven hundred seventy-five thousand, five hundred sixty-six".