166424940 has 72 divisors (see below), whose sum is σ = 550721808. Its totient is φ = 40344960.

The previous prime is 166424837. The next prime is 166424953. The reversal of 166424940 is 49424661.

166424940 is a `hidden beast` number, since 1 + 6 + 642 + 4 + 9 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 166424895 and 166424904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40047 + ... + 44006.

It is an arithmetic number, because the mean of its divisors is an integer number (7648914).

Almost surely, 2^166424940 is an apocalyptic number.

166424940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166424940 is an abundant number, since it is smaller than the sum of its proper divisors (384296868).

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

166424940 is a wasteful number, since it uses less digits than its factorization.

166424940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84079 (or 84074 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 166424940 is about 12900.5790567711. The cubic root of 166424940 is about 550.0550247979.

The spelling of 166424940 in words is "one hundred sixty-six million, four hundred twenty-four thousand, nine hundred forty".