66221062016 has 32 divisors (see below), whose sum is σ = 131956624800. Its totient is φ = 33102536704.

The previous prime is 66221062009. The next prime is 66221062093. The reversal of 66221062016 is 61026012266.

66221062016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488681 + ... + 609303.

It is an arithmetic number, because the mean of its divisors is an integer number (4123644525).

Almost surely, 2^66221062016 is an apocalyptic number.

It is an amenable number.

66221062016 is a deficient number, since it is larger than the sum of its proper divisors (65735562784).

66221062016 is a wasteful number, since it uses less digits than its factorization.

66221062016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124926 (or 124914 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 66221062016 in words is "sixty-six billion, two hundred twenty-one million, sixty-two thousand, sixteen".