166551466 has 16 divisors (see below), whose sum is σ = 259239240. Its totient is φ = 80156160.

The previous prime is 166551433. The next prime is 166551479. The reversal of 166551466 is 664155661.

It can be written as a sum of positive squares in 4 ways, for example, as 127125625 + 39425841 = 11275^2 + 6279^2 .

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, 15286 + ... + 23806.

Almost surely, 2^166551466 is an apocalyptic number.

166551466 is a deficient number, since it is larger than the sum of its proper divisors (92687774).

166551466 is a wasteful number, since it uses less digits than its factorization.

166551466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8889.

The product of its digits is 129600, while the sum is 40.

The square root of 166551466 is about 12905.4820134701. The cubic root of 166551466 is about 550.1943841841.

The spelling of 166551466 in words is "one hundred sixty-six million, five hundred fifty-one thousand, four hundred sixty-six".