66406644962 has 32 divisors (see below), whose sum is σ = 114330027648. Its totient is φ = 28337734656.

The previous prime is 66406644949. The next prime is 66406644973. The reversal of 66406644962 is 26944660466.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3196613 + ... + 3217319.

It is an arithmetic number, because the mean of its divisors is an integer number (3572813364).

Almost surely, 2^66406644962 is an apocalyptic number.

66406644962 is a deficient number, since it is larger than the sum of its proper divisors (47923382686).

66406644962 is a wasteful number, since it uses less digits than its factorization.

66406644962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21690.

The product of its (nonzero) digits is 8957952, while the sum is 53.

The spelling of 66406644962 in words is "sixty-six billion, four hundred six million, six hundred forty-four thousand, nine hundred sixty-two".