664377 has 16 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 357120.

The previous prime is 664369. The next prime is 664379. The reversal of 664377 is 773466.

It is not a de Polignac number, because 664377 - 2³ = 664369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574 + ... + 1287.

It is an arithmetic number, because the mean of its divisors is an integer number (67032).

2⁶⁶⁴³⁷⁷ is an apocalyptic number.

It is an amenable number.

664377 is a deficient number, since it is larger than the sum of its proper divisors (408135).

664377 is a wasteful number, since it uses less digits than its factorization.

664377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888.

The product of its digits is 21168, while the sum is 33.

The square root of 664377 is about 815.0932461995. The cubic root of 664377 is about 87.2579213559.

It can be divided in two parts, 66 and 4377, that multiplied together give a palindrome (288882).

The spelling of 664377 in words is "six hundred sixty-four thousand, three hundred seventy-seven".