66323688 has 16 divisors (see below), whose sum is σ = 165809280. Its totient is φ = 22107888.

The previous prime is 66323687. The next prime is 66323689. The reversal of 66323688 is 88632366.

It is an interprime number because it is at equal distance from previous prime (66323687) and next prime (66323689).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (66323687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381720 + ... + 1381767.

It is an arithmetic number, because the mean of its divisors is an integer number (10363080).

Almost surely, 2^66323688 is an apocalyptic number.

It is an amenable number.

66323688 is an abundant number, since it is smaller than the sum of its proper divisors (99485592).

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

66323688 is a wasteful number, since it uses less digits than its factorization.

66323688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763496 (or 2763492 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 66323688 is about 8143.9356578991. The cubic root of 66323688 is about 404.7835819814.

The spelling of 66323688 in words is "sixty-six million, three hundred twenty-three thousand, six hundred eighty-eight".