167981664 has 48 divisors (see below), whose sum is σ = 442613808. Its totient is φ = 55782912.

The previous prime is 167981657. The next prime is 167981677. The reversal of 167981664 is 466189761.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 23434 + ... + 29750.

It is an arithmetic number, because the mean of its divisors is an integer number (9221121).

Almost surely, 2^167981664 is an apocalyptic number.

It is an amenable number.

167981664 is an abundant number, since it is smaller than the sum of its proper divisors (274632144).

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

167981664 is a wasteful number, since it uses less digits than its factorization.

167981664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607 (or 6599 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 167981664 is about 12960.7740509585. The cubic root of 167981664 is about 551.7647600880.

The spelling of 167981664 in words is "one hundred sixty-seven million, nine hundred eighty-one thousand, six hundred sixty-four".