66931360 has 24 divisors (see below), whose sum is σ = 158125716. Its totient is φ = 26772480.

The previous prime is 66931351. The next prime is 66931399. The reversal of 66931360 is 6313966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65092624 + 1838736 = 8068^2 + 1356^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209001 + ... + 209320.

Almost surely, 2^66931360 is an apocalyptic number.

It is an amenable number.

66931360 is an abundant number, since it is smaller than the sum of its proper divisors (91194356).

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

66931360 is a wasteful number, since it uses less digits than its factorization.

66931360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418336 (or 418328 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 66931360 is about 8181.1588421201. The cubic root of 66931360 is about 406.0160638163.

The spelling of 66931360 in words is "sixty-six million, nine hundred thirty-one thousand, three hundred sixty".