166555110 has 16 divisors (see below), whose sum is σ = 399732336. Its totient is φ = 44414688.

The previous prime is 166555087. The next prime is 166555133. The reversal of 166555110 is 11555661.

It is an interprime number because it is at equal distance from previous prime (166555087) and next prime (166555133).

It is a super-2 number, since 2×166555110² = 55481209334224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5551837 = 166555110 / (1 + 6 + 6 + 5 + 5 + 5 + 1 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2775889 + ... + 2775948.

It is an arithmetic number, because the mean of its divisors is an integer number (24983271).

Almost surely, 2^166555110 is an apocalyptic number.

166555110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166555110 is an abundant number, since it is smaller than the sum of its proper divisors (233177226).

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

166555110 is a wasteful number, since it uses less digits than its factorization.

166555110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551847.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 166555110 is about 12905.6231930116. The cubic root of 166555110 is about 550.1983967450.

The spelling of 166555110 in words is "one hundred sixty-six million, five hundred fifty-five thousand, one hundred ten".