664562770751 has 12 divisors (see below), whose sum is σ = 742229625960. Its totient is φ = 590098002480.

The previous prime is 664562770733. The next prime is 664562770769. The reversal of 664562770751 is 157077265466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (664562770733) and next prime (664562770769).

It is a de Polignac number, because none of the positive numbers 2^k-664562770751 is a prime.

It is a super-3 number, since 3×664562770751³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664562770451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16316816 + ... + 16357493.

It is an arithmetic number, because the mean of its divisors is an integer number (61852468830).

Almost surely, 2^664562770751 is an apocalyptic number.

664562770751 is a deficient number, since it is larger than the sum of its proper divisors (77666855209).

664562770751 is a wasteful number, since it uses less digits than its factorization.

664562770751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32674406 (or 32674363 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 56.

The spelling of 664562770751 in words is "six hundred sixty-four billion, five hundred sixty-two million, seven hundred seventy thousand, seven hundred fifty-one".