67331920 has 40 divisors (see below), whose sum is σ = 156916296. Its totient is φ = 26869248.

The previous prime is 67331903. The next prime is 67331941. The reversal of 67331920 is 2913376.

It can be written as a sum of positive squares in 4 ways, for example, as 5740816 + 61591104 = 2396^2 + 7848^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 48354 + ... + 49726.

Almost surely, 2^67331920 is an apocalyptic number.

It is an amenable number.

67331920 is an abundant number, since it is smaller than the sum of its proper divisors (89584376).

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

67331920 is a wasteful number, since it uses less digits than its factorization.

67331920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1993 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 67331920 is about 8205.6029638290. The cubic root of 67331920 is about 406.8244065428.

The spelling of 67331920 in words is "sixty-seven million, three hundred thirty-one thousand, nine hundred twenty".