66562802512 has 40 divisors (see below), whose sum is σ = 129594712104. Its totient is φ = 33119176704.

The previous prime is 66562802459. The next prime is 66562802533. The reversal of 66562802512 is 21520826566.

It can be written as a sum of positive squares in 4 ways, for example, as 1926858816 + 64635943696 = 43896^2 + 254236^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8022238 + ... + 8030530.

Almost surely, 2^66562802512 is an apocalyptic number.

It is an amenable number.

66562802512 is a deficient number, since it is larger than the sum of its proper divisors (63031909592).

66562802512 is a wasteful number, since it uses less digits than its factorization.

66562802512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10687 (or 10681 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 66562802512 in words is "sixty-six billion, five hundred sixty-two million, eight hundred two thousand, five hundred twelve".