166343955 has 32 divisors (see below), whose sum is σ = 280899840. Its totient is φ = 83825280.

The previous prime is 166343939. The next prime is 166343977. The reversal of 166343955 is 559343661.

166343955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166343955 - 2⁴ = 166343939 is a prime.

It is a super-2 number, since 2×166343955² = 55340622730084050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187944 + ... + 188826.

It is an arithmetic number, because the mean of its divisors is an integer number (8778120).

Almost surely, 2^166343955 is an apocalyptic number.

166343955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166343955 is a deficient number, since it is larger than the sum of its proper divisors (114555885).

166343955 is a wasteful number, since it uses less digits than its factorization.

166343955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its digits is 291600, while the sum is 42.

The square root of 166343955 is about 12897.4398622362. The cubic root of 166343955 is about 549.9657885056.

The spelling of 166343955 in words is "one hundred sixty-six million, three hundred forty-three thousand, nine hundred fifty-five".