66534075364 has 9 divisors (see below), whose sum is σ = 116435534691. Its totient is φ = 33266779740.

The previous prime is 66534075359. The next prime is 66534075371. The reversal of 66534075364 is 46357043566.

The square root of 66534075364 is 257942.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 451399 + ... + 580369.

Almost surely, 2^66534075364 is an apocalyptic number.

66534075364 is the 257942-nd square number.

It is an amenable number.

66534075364 is a deficient number, since it is larger than the sum of its proper divisors (49901459327).

66534075364 is an frugal number, since it uses more digits than its factorization.

66534075364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257946 (or 128973 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 49.

Multiplying 66534075364 by its sum of digits (49), we get a square (3260169692836 = 1805594²).

The spelling of 66534075364 in words is "sixty-six billion, five hundred thirty-four million, seventy-five thousand, three hundred sixty-four".