664076013 has 4 divisors (see below), whose sum is σ = 885434688. Its totient is φ = 442717340.

The previous prime is 664075991. The next prime is 664076071. The reversal of 664076013 is 310670466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664076013 - 2¹² = 664071917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664078013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110679333 + ... + 110679338.

It is an arithmetic number, because the mean of its divisors is an integer number (221358672).

Almost surely, 2^664076013 is an apocalyptic number.

It is an amenable number.

664076013 is a deficient number, since it is larger than the sum of its proper divisors (221358675).

664076013 is a wasteful number, since it uses less digits than its factorization.

664076013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221358674.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 664076013 is about 25769.6723494887. The cubic root of 664076013 is about 872.4474235908.

The spelling of 664076013 in words is "six hundred sixty-four million, seventy-six thousand, thirteen".