664466601 has 4 divisors (see below), whose sum is σ = 885955472. Its totient is φ = 442977732.

The previous prime is 664466599. The next prime is 664466603. The reversal of 664466601 is 106664466.

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 an interprime number because it is at equal distance from previous prime (664466599) and next prime (664466603).

It is not a de Polignac number, because 664466601 - 2¹ = 664466599 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 664466601.

It is not an unprimeable number, because it can be changed into a prime (664466603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110744431 + ... + 110744436.

It is an arithmetic number, because the mean of its divisors is an integer number (221488868).

Almost surely, 2^664466601 is an apocalyptic number.

It is an amenable number.

664466601 is a deficient number, since it is larger than the sum of its proper divisors (221488871).

664466601 is a wasteful number, since it uses less digits than its factorization.

664466601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221488870.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 664466601 is about 25777.2496787380. The cubic root of 664466601 is about 872.6184385047.

The spelling of 664466601 in words is "six hundred sixty-four million, four hundred sixty-six thousand, six hundred one".