66518752 has 12 divisors (see below), whose sum is σ = 130958856. Its totient is φ = 33259360.

The previous prime is 66518741. The next prime is 66518761. The reversal of 66518752 is 25781566.

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, 1039324 + ... + 1039387.

It is an arithmetic number, because the mean of its divisors is an integer number (10913238).

Almost surely, 2^66518752 is an apocalyptic number.

It is an amenable number.

66518752 is a deficient number, since it is larger than the sum of its proper divisors (64440104).

66518752 is a wasteful number, since it uses less digits than its factorization.

66518752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078721 (or 2078713 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 66518752 is about 8155.9028929972. The cubic root of 66518752 is about 405.1800286859.

The spelling of 66518752 in words is "sixty-six million, five hundred eighteen thousand, seven hundred fifty-two".