66500042365 has 32 divisors (see below), whose sum is σ = 81551218176. Its totient is φ = 52045701120.

The previous prime is 66500042363. The next prime is 66500042381. The reversal of 66500042365 is 56324000566.

It is not a de Polignac number, because 66500042365 - 2¹ = 66500042363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66500042363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33365809 + ... + 33367801.

It is an arithmetic number, because the mean of its divisors is an integer number (2548475568).

Almost surely, 2^66500042365 is an apocalyptic number.

It is an amenable number.

66500042365 is a deficient number, since it is larger than the sum of its proper divisors (15051175811).

66500042365 is a wasteful number, since it uses less digits than its factorization.

66500042365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 66500042365 in words is "sixty-six billion, five hundred million, forty-two thousand, three hundred sixty-five".