66000564690720 has 192 divisors, whose sum is σ = 228676338898560. Its totient is φ = 16000136739840.

The previous prime is 66000564690713. The next prime is 66000564690733. The reversal of 66000564690720 is 2709646500066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51014455 + ... + 52292214.

It is an arithmetic number, because the mean of its divisors is an integer number (1191022598430).

Almost surely, 2^{66000564690720} is an apocalyptic number.

66000564690720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66000564690720 is an abundant number, since it is smaller than the sum of its proper divisors (162675774207840).

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

66000564690720 is a wasteful number, since it uses less digits than its factorization.

66000564690720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103306720 (or 103306690 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The spelling of 66000564690720 in words is "sixty-six trillion, five hundred sixty-four million, six hundred ninety thousand, seven hundred twenty".