66257848836 has 27 divisors (see below), whose sum is σ = 167489021973. Its totient is φ = 22085434800.

The previous prime is 66257848831. The next prime is 66257848837. The reversal of 66257848836 is 63884875266.

The square root of 66257848836 is 257406.

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

66257848836 is a `hidden beast` number, since 66 + 25 + 78 + 488 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51713488836 + 14544360000 = 227406^2 + 120600^2 .

It is not an unprimeable number, because it can be changed into a prime (66257848831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1522986 + ... + 1565886.

Almost surely, 2^66257848836 is an apocalyptic number.

66257848836 is the 257406-th square number.

It is an amenable number.

66257848836 is an abundant number, since it is smaller than the sum of its proper divisors (101231173137).

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

66257848836 is an frugal number, since it uses more digits than its factorization.

66257848836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85812 (or 42906 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 66257848836 in words is "sixty-six billion, two hundred fifty-seven million, eight hundred forty-eight thousand, eight hundred thirty-six".