66664022 has 4 divisors (see below), whose sum is σ = 99996036. Its totient is φ = 33332010.

The previous prime is 66664007. The next prime is 66664049. The reversal of 66664022 is 22046666.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66664022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16666004 + ... + 16666007.

It is an arithmetic number, because the mean of its divisors is an integer number (24999009).

Almost surely, 2^66664022 is an apocalyptic number.

66664022 is a deficient number, since it is larger than the sum of its proper divisors (33332014).

66664022 is a wasteful number, since it uses less digits than its factorization.

66664022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33332013.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 66664022 is about 8164.8038555742. The cubic root of 66664022 is about 405.4747711684.

The spelling of 66664022 in words is "sixty-six million, six hundred sixty-four thousand, twenty-two".