66887915132 has 24 divisors (see below), whose sum is σ = 118698795600. Its totient is φ = 32977226880.

The previous prime is 66887915123. The next prime is 66887915137. The reversal of 66887915132 is 23151978866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66887915137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324257 + ... + 488792.

It is an arithmetic number, because the mean of its divisors is an integer number (4945783150).

Almost surely, 2^66887915132 is an apocalyptic number.

It is an amenable number.

66887915132 is a deficient number, since it is larger than the sum of its proper divisors (51810880468).

66887915132 is a wasteful number, since it uses less digits than its factorization.

66887915132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813341 (or 813339 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The spelling of 66887915132 in words is "sixty-six billion, eight hundred eighty-seven million, nine hundred fifteen thousand, one hundred thirty-two".