66956265966 has 16 divisors (see below), whose sum is σ = 133996403664. Its totient is φ = 22304776704.

The previous prime is 66956265911. The next prime is 66956265967.

66956265966 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66956265897 and 66956265906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66956265967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484275 + ... + 3503438.

It is an arithmetic number, because the mean of its divisors is an integer number (8374775229).

Almost surely, 2^66956265966 is an apocalyptic number.

66956265966 is an abundant number, since it is smaller than the sum of its proper divisors (67040137698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66956265966 is a wasteful number, since it uses less digits than its factorization.

66956265966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989315.

The product of its digits is 188956800, while the sum is 66.

The spelling of 66956265966 in words is "sixty-six billion, nine hundred fifty-six million, two hundred sixty-five thousand, nine hundred sixty-six".