651606064266 has 32 divisors (see below), whose sum is σ = 1379731775040. Its totient is φ = 204580905984.

The previous prime is 651606064253. The next prime is 651606064273. The reversal of 651606064266 is 662460606156.

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, 16500055 + ... + 16539498.

It is an arithmetic number, because the mean of its divisors is an integer number (43116617970).

Almost surely, 2^651606064266 is an apocalyptic number.

651606064266 is an abundant number, since it is smaller than the sum of its proper divisors (728125710774).

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

651606064266 is a wasteful number, since it uses less digits than its factorization.

651606064266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33039750.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 651606064266 in words is "six hundred fifty-one billion, six hundred six million, sixty-four thousand, two hundred sixty-six".