66487568 has 40 divisors (see below), whose sum is σ = 150823680. Its totient is φ = 27797760.

The previous prime is 66487567. The next prime is 66487573. The reversal of 66487568 is 86578466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66487567) 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, 2648 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (3770592).

Almost surely, 2^66487568 is an apocalyptic number.

It is an amenable number.

66487568 is an abundant number, since it is smaller than the sum of its proper divisors (84336112).

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

66487568 is a wasteful number, since it uses less digits than its factorization.

66487568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14535 (or 14529 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The square root of 66487568 is about 8153.9909246945. The cubic root of 66487568 is about 405.1167026382.

The spelling of 66487568 in words is "sixty-six million, four hundred eighty-seven thousand, five hundred sixty-eight".