66339564 has 24 divisors (see below), whose sum is σ = 162939840. Its totient is φ = 20949264.

The previous prime is 66339563. The next prime is 66339569. The reversal of 66339564 is 46593366.

It is not an unprimeable number, because it can be changed into a prime (66339563) 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, 145254 + ... + 145709.

It is an arithmetic number, because the mean of its divisors is an integer number (6789160).

Almost surely, 2^66339564 is an apocalyptic number.

It is an amenable number.

66339564 is an abundant number, since it is smaller than the sum of its proper divisors (96600276).

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

66339564 is a wasteful number, since it uses less digits than its factorization.

66339564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290989 (or 290987 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 66339564 is about 8144.9103125817. The cubic root of 66339564 is about 404.8158772876.

The spelling of 66339564 in words is "sixty-six million, three hundred thirty-nine thousand, five hundred sixty-four".