66250636945 has 16 divisors (see below), whose sum is σ = 79839659520. Its totient is φ = 52774804800.

The previous prime is 66250636847. The next prime is 66250636961. The reversal of 66250636945 is 54963605266.

It is not a de Polignac number, because 66250636945 - 2³³ = 57660702353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66250636892 and 66250636901.

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, 2533035 + ... + 2559055.

It is an arithmetic number, because the mean of its divisors is an integer number (4989978720).

Almost surely, 2^66250636945 is an apocalyptic number.

It is an amenable number.

66250636945 is a deficient number, since it is larger than the sum of its proper divisors (13589022575).

66250636945 is a wasteful number, since it uses less digits than its factorization.

66250636945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28176.

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 66250636945 in words is "sixty-six billion, two hundred fifty million, six hundred thirty-six thousand, nine hundred forty-five".