664466407 has 4 divisors (see below), whose sum is σ = 724872456. Its totient is φ = 604060360.

The previous prime is 664466399. The next prime is 664466417. The reversal of 664466407 is 704664466.

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

It is a cyclic number.

It is not a de Polignac number, because 664466407 - 2³ = 664466399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664466417) 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, 30203008 + ... + 30203029.

It is an arithmetic number, because the mean of its divisors is an integer number (181218114).

Almost surely, 2^664466407 is an apocalyptic number.

664466407 is a deficient number, since it is larger than the sum of its proper divisors (60406049).

664466407 is a wasteful number, since it uses less digits than its factorization.

664466407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60406048.

The product of its (nonzero) digits is 580608, while the sum is 43.

The square root of 664466407 is about 25777.2459157296. The cubic root of 664466407 is about 872.6183535805.

The spelling of 664466407 in words is "six hundred sixty-four million, four hundred sixty-six thousand, four hundred seven".