166556651061105 has 64 divisors (see below), whose sum is σ = 302412820792320. Its totient is φ = 86936732725248.

The previous prime is 166556651061077. The next prime is 166556651061137. The reversal of 166556651061105 is 501160156655661.

166556651061105 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 5 + 6 + 6 + 5 + 10 + 611 + 0 + 5 = 666.

It is not a de Polignac number, because 166556651061105 - 2¹⁰ = 166556651060081 is a prime.

It is a super-2 number, since 2×166556651061105² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162129349 + ... + 163153421.

It is an arithmetic number, because the mean of its divisors is an integer number (4725200324880).

Almost surely, 2^{166556651061105} is an apocalyptic number.

166556651061105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166556651061105 is a deficient number, since it is larger than the sum of its proper divisors (135856169731215).

166556651061105 is a wasteful number, since it uses less digits than its factorization.

166556651061105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049767 (or 1049761 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 54.

The spelling of 166556651061105 in words is "one hundred sixty-six trillion, five hundred fifty-six billion, six hundred fifty-one million, sixty-one thousand, one hundred five".