66564743356 has 12 divisors (see below), whose sum is σ = 117270102600. Its totient is φ = 33058999760.

The previous prime is 66564743321. The next prime is 66564743369. The reversal of 66564743356 is 65334746566.

It is a happy number.

It is a super-2 number, since 2×66564743356² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66564743297 and 66564743306.

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, 55842310 + ... + 55843501.

It is an arithmetic number, because the mean of its divisors is an integer number (9772508550).

Almost surely, 2^66564743356 is an apocalyptic number.

It is an amenable number.

66564743356 is a deficient number, since it is larger than the sum of its proper divisors (50705359244).

66564743356 is a wasteful number, since it uses less digits than its factorization.

66564743356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111685964 (or 111685962 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 55.

The spelling of 66564743356 in words is "sixty-six billion, five hundred sixty-four million, seven hundred forty-three thousand, three hundred fifty-six".