664633737979 has 8 divisors (see below), whose sum is σ = 674575724048. Its totient is φ = 654692401440.

The previous prime is 664633737919. The next prime is 664633737983. The reversal of 664633737979 is 979737336466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664633737979 - 2²⁵ = 664600183547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664633737919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2142169 + ... + 2432725.

It is an arithmetic number, because the mean of its divisors is an integer number (84321965506).

Almost surely, 2^664633737979 is an apocalyptic number.

664633737979 is a deficient number, since it is larger than the sum of its proper divisors (9941986069).

664633737979 is a wasteful number, since it uses less digits than its factorization.

664633737979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324765.

The product of its digits is 648121824, while the sum is 70.

The spelling of 664633737979 in words is "six hundred sixty-four billion, six hundred thirty-three million, seven hundred thirty-seven thousand, nine hundred seventy-nine".