66929320 has 32 divisors (see below), whose sum is σ = 152660520. Its totient is φ = 26403840.

The previous prime is 66929311. The next prime is 66929327. The reversal of 66929320 is 2392966.

It can be written as a sum of positive squares in 4 ways, for example, as 54552996 + 12376324 = 7386^2 + 3518^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66929320.

It is not an unprimeable number, because it can be changed into a prime (66929327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8541 + ... + 14380.

Almost surely, 2^66929320 is an apocalyptic number.

It is an amenable number.

66929320 is an abundant number, since it is smaller than the sum of its proper divisors (85731200).

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

66929320 is a wasteful number, since it uses less digits than its factorization.

66929320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23005 (or 23001 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 66929320 is about 8181.0341644562. The cubic root of 66929320 is about 406.0119387884.

The spelling of 66929320 in words is "sixty-six million, nine hundred twenty-nine thousand, three hundred twenty".