66923568 has 30 divisors (see below), whose sum is σ = 187293444. Its totient is φ = 22307808.

The previous prime is 66923533. The next prime is 66923569. The reversal of 66923568 is 86532966.

It is a happy number.

66923568 is a `hidden beast` number, since 6 + 69 + 23 + 568 = 666.

It is not an unprimeable number, because it can be changed into a prime (66923569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232230 + ... + 232517.

Almost surely, 2^66923568 is an apocalyptic number.

It is an amenable number.

66923568 is an abundant number, since it is smaller than the sum of its proper divisors (120369876).

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

66923568 is a wasteful number, since it uses less digits than its factorization.

66923568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464761 (or 464752 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 66923568 is about 8180.6826121052. The cubic root of 66923568 is about 406.0003073760. Note that the first 3 decimals are identical.

The spelling of 66923568 in words is "sixty-six million, nine hundred twenty-three thousand, five hundred sixty-eight".