66512504365 has 16 divisors (see below), whose sum is σ = 80956615680. Its totient is φ = 52451118720.

The previous prime is 66512504351. The next prime is 66512504393. The reversal of 66512504365 is 56340521566.

It is not a de Polignac number, because 66512504365 - 2⁹ = 66512503853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107260 + ... + 380170.

It is an arithmetic number, because the mean of its divisors is an integer number (5059788480).

Almost surely, 2^66512504365 is an apocalyptic number.

It is an amenable number.

66512504365 is a deficient number, since it is larger than the sum of its proper divisors (14444111315).

66512504365 is a wasteful number, since it uses less digits than its factorization.

66512504365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273612.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 66512504365 in words is "sixty-six billion, five hundred twelve million, five hundred four thousand, three hundred sixty-five".