166404624 has 20 divisors (see below), whose sum is σ = 429878736. Its totient is φ = 55468192.

The previous prime is 166404583. The next prime is 166404631. The reversal of 166404624 is 426404661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1733334 + ... + 1733429.

Almost surely, 2^166404624 is an apocalyptic number.

It is an amenable number.

166404624 is an abundant number, since it is smaller than the sum of its proper divisors (263474112).

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

166404624 is a wasteful number, since it uses less digits than its factorization.

166404624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466774 (or 3466768 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 166404624 is about 12899.7916262240. The cubic root of 166404624 is about 550.0326415889.

The spelling of 166404624 in words is "one hundred sixty-six million, four hundred four thousand, six hundred twenty-four".