66195752080 has 40 divisors (see below), whose sum is σ = 153939557952. Its totient is φ = 26472376704.

The previous prime is 66195752059. The next prime is 66195752131. The reversal of 66195752080 is 8025759166.

It is a tau number, because it is divible by the number of its divisors (40).

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, 276367 + ... + 456913.

Almost surely, 2^66195752080 is an apocalyptic number.

It is an amenable number.

66195752080 is an abundant number, since it is smaller than the sum of its proper divisors (87743805872).

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

66195752080 is a wasteful number, since it uses less digits than its factorization.

66195752080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185143 (or 185137 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 66195752080 in words is "sixty-six billion, one hundred ninety-five million, seven hundred fifty-two thousand, eighty".