66315768 has 32 divisors (see below), whose sum is σ = 166047360. Its totient is φ = 22070880.

The previous prime is 66315751. The next prime is 66315787. The reversal of 66315768 is 86751366.

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, 17133 + ... + 20643.

It is an arithmetic number, because the mean of its divisors is an integer number (5188980).

Almost surely, 2^66315768 is an apocalyptic number.

It is an amenable number.

66315768 is an abundant number, since it is smaller than the sum of its proper divisors (99731592).

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

66315768 is a wasteful number, since it uses less digits than its factorization.

66315768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307 (or 4303 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 66315768 is about 8143.4493919960. The cubic root of 66315768 is about 404.7674690174.

The spelling of 66315768 in words is "sixty-six million, three hundred fifteen thousand, seven hundred sixty-eight".