66764600900 has 36 divisors (see below), whose sum is σ = 148412831700. Its totient is φ = 26054476800.

The previous prime is 66764600857. The next prime is 66764600909. The reversal of 66764600900 is 900646766.

It can be written as a sum of positive squares in 6 ways, for example, as 11173335616 + 55591265284 = 105704^2 + 235778^2 .

It is not an unprimeable number, because it can be changed into a prime (66764600909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8137925 + ... + 8146124.

Almost surely, 2^66764600900 is an apocalyptic number.

It is an amenable number.

66764600900 is an abundant number, since it is smaller than the sum of its proper divisors (81648230800).

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

66764600900 is a wasteful number, since it uses less digits than its factorization.

66764600900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284104 (or 16284097 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 66764600900 in words is "sixty-six billion, seven hundred sixty-four million, six hundred thousand, nine hundred".