166451956 has 36 divisors (see below), whose sum is σ = 321455680. Its totient is φ = 75358800.

The previous prime is 166451953. The next prime is 166451977. The reversal of 166451956 is 659154661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166451953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159685 + ... + 160723.

Almost surely, 2^166451956 is an apocalyptic number.

It is an amenable number.

166451956 is a deficient number, since it is larger than the sum of its proper divisors (155003724).

166451956 is a wasteful number, since it uses less digits than its factorization.

166451956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1383 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 166451956 is about 12901.6260990621. The cubic root of 166451956 is about 550.0847869287.

The spelling of 166451956 in words is "one hundred sixty-six million, four hundred fifty-one thousand, nine hundred fifty-six".