66738536 has 32 divisors (see below), whose sum is σ = 129676800. Its totient is φ = 32166720.

The previous prime is 66738517. The next prime is 66738563. The reversal of 66738536 is 63583766.

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, 108566 + ... + 109178.

It is an arithmetic number, because the mean of its divisors is an integer number (4052400).

Almost surely, 2^66738536 is an apocalyptic number.

It is an amenable number.

66738536 is a deficient number, since it is larger than the sum of its proper divisors (62938264).

66738536 is a wasteful number, since it uses less digits than its factorization.

66738536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1085 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 66738536 is about 8169.3657036517. The cubic root of 66738536 is about 405.6257886441.

The spelling of 66738536 in words is "sixty-six million, seven hundred thirty-eight thousand, five hundred thirty-six".