165566156556110 has 32 divisors (see below), whose sum is σ = 298348313333760. Its totient is φ = 66153302455968.

The previous prime is 165566156556103. The next prime is 165566156556127. The reversal of 165566156556110 is 11655651665561.

It is a self number, because there is not a number n which added to its sum of digits gives 165566156556110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770961209 + ... + 771175931.

It is an arithmetic number, because the mean of its divisors is an integer number (9323384791680).

Almost surely, 2^{165566156556110} is an apocalyptic number.

165566156556110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165566156556110 is a deficient number, since it is larger than the sum of its proper divisors (132782156777650).

165566156556110 is a wasteful number, since it uses less digits than its factorization.

165566156556110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299552.

The product of its (nonzero) digits is 24300000, while the sum is 59.

The spelling of 165566156556110 in words is "one hundred sixty-five trillion, five hundred sixty-six billion, one hundred fifty-six million, five hundred fifty-six thousand, one hundred ten".