66610362724 has 12 divisors (see below), whose sum is σ = 116572366204. Its totient is φ = 33303972384.

The previous prime is 66610362719. The next prime is 66610362737. The reversal of 66610362724 is 42726301666.

It can be written as a sum of positive squares in 2 ways, for example, as 28033474624 + 38576888100 = 167432^2 + 196410^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172047 + ... + 403510.

Almost surely, 2^66610362724 is an apocalyptic number.

It is an amenable number.

66610362724 is a deficient number, since it is larger than the sum of its proper divisors (49962003480).

66610362724 is a wasteful number, since it uses less digits than its factorization.

66610362724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604494 (or 604492 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

It can be divided in two parts, 666103 and 62724, that added together give a palindrome (728827).

The spelling of 66610362724 in words is "sixty-six billion, six hundred ten million, three hundred sixty-two thousand, seven hundred twenty-four".