66572311700 has 18 divisors (see below), whose sum is σ = 144461916606. Its totient is φ = 26628924640.

The previous prime is 66572311697. The next prime is 66572311711. The reversal of 66572311700 is 711327566.

It can be written as a sum of positive squares in 3 ways, for example, as 1658444176 + 64913867524 = 40724^2 + 254782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332861459 + ... + 332861658.

Almost surely, 2^66572311700 is an apocalyptic number.

It is an amenable number.

66572311700 is an abundant number, since it is smaller than the sum of its proper divisors (77889604906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66572311700 is a wasteful number, since it uses less digits than its factorization.

66572311700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665723131 (or 665723124 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 66572311700 in words is "sixty-six billion, five hundred seventy-two million, three hundred eleven thousand, seven hundred".