66396532 has 6 divisors (see below), whose sum is σ = 116193938. Its totient is φ = 33198264.

The previous prime is 66396511. The next prime is 66396541. The reversal of 66396532 is 23569366.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65869456 + 527076 = 8116^2 + 726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8299563 + ... + 8299570.

Almost surely, 2^66396532 is an apocalyptic number.

It is an amenable number.

66396532 is a deficient number, since it is larger than the sum of its proper divisors (49797406).

66396532 is a wasteful number, since it uses less digits than its factorization.

66396532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16599137 (or 16599135 counting only the distinct ones).

The product of its digits is 174960, while the sum is 40.

The square root of 66396532 is about 8148.4067154260. The cubic root of 66396532 is about 404.9317204407.

The spelling of 66396532 in words is "sixty-six million, three hundred ninety-six thousand, five hundred thirty-two".