66150811204 has 9 divisors (see below), whose sum is σ = 115764819807. Its totient is φ = 33075148404.

The previous prime is 66150811171. The next prime is 66150811229. The reversal of 66150811204 is 40211805166.

The square root of 66150811204 is 257198.

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

66150811204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66150811204.

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, 450097 + ... + 578695.

Almost surely, 2^66150811204 is an apocalyptic number.

66150811204 is the 257198-th square number.

It is an amenable number.

66150811204 is a deficient number, since it is larger than the sum of its proper divisors (49614008603).

66150811204 is an frugal number, since it uses more digits than its factorization.

66150811204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257202 (or 128601 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 66150811204 in words is "sixty-six billion, one hundred fifty million, eight hundred eleven thousand, two hundred four".