66622660442264 has 8 divisors (see below), whose sum is σ = 124917488329260. Its totient is φ = 33311330221128.

The previous prime is 66622660442263. The next prime is 66622660442267. The reversal of 66622660442264 is 46224406622666.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622660442263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4163916277634 + ... + 4163916277649.

Almost surely, 2^{66622660442264} is an apocalyptic number.

It is an amenable number.

66622660442264 is a deficient number, since it is larger than the sum of its proper divisors (58294827886996).

66622660442264 is a wasteful number, since it uses less digits than its factorization.

66622660442264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327832555289 (or 8327832555285 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 56.

The spelling of 66622660442264 in words is "sixty-six trillion, six hundred twenty-two billion, six hundred sixty million, four hundred forty-two thousand, two hundred sixty-four".