166913838 has 64 divisors (see below), whose sum is σ = 456529920. Its totient is φ = 44019936.

The previous prime is 166913833. The next prime is 166913839. The reversal of 166913838 is 838319661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166913793 and 166913802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166913833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12070 + ... + 21897.

It is an arithmetic number, because the mean of its divisors is an integer number (7133280).

Almost surely, 2^166913838 is an apocalyptic number.

166913838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166913838 is an abundant number, since it is smaller than the sum of its proper divisors (289616082).

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

166913838 is a wasteful number, since it uses less digits than its factorization.

166913838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33998 (or 33992 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 166913838 is about 12919.5138453426. The cubic root of 166913838 is about 550.5931210288.

The spelling of 166913838 in words is "one hundred sixty-six million, nine hundred thirteen thousand, eight hundred thirty-eight".