66252621465 has 32 divisors (see below), whose sum is σ = 119201523840. Its totient is φ = 34909005888.

The previous prime is 66252621443. The next prime is 66252621473. The reversal of 66252621465 is 56412625266.

66252621465 is a `hidden beast` number, since 6 + 62 + 526 + 2 + 1 + 4 + 65 = 666.

It is not a de Polignac number, because 66252621465 - 2⁶ = 66252621401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66252621465.

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, 2945182 + ... + 2967591.

It is an arithmetic number, because the mean of its divisors is an integer number (3725047620).

Almost surely, 2^66252621465 is an apocalyptic number.

It is an amenable number.

66252621465 is a deficient number, since it is larger than the sum of its proper divisors (52948902375).

66252621465 is a wasteful number, since it uses less digits than its factorization.

66252621465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912870 (or 5912864 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 66252621465 in words is "sixty-six billion, two hundred fifty-two million, six hundred twenty-one thousand, four hundred sixty-five".