664773367 has 4 divisors (see below), whose sum is σ = 665858440. Its totient is φ = 663688296.

The previous prime is 664773353. The next prime is 664773371. The reversal of 664773367 is 763377466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664773367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664773367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664773337) 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, 541617 + ... + 542842.

It is an arithmetic number, because the mean of its divisors is an integer number (166464610).

Almost surely, 2^664773367 is an apocalyptic number.

664773367 is a deficient number, since it is larger than the sum of its proper divisors (1085073).

664773367 is a wasteful number, since it uses less digits than its factorization.

664773367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085072.

The product of its digits is 2667168, while the sum is 49.

The square root of 664773367 is about 25783.1993166093. The cubic root of 664773367 is about 872.7527058419.

The spelling of 664773367 in words is "six hundred sixty-four million, seven hundred seventy-three thousand, three hundred sixty-seven".