664015445 has 8 divisors (see below), whose sum is σ = 797147136. Its totient is φ = 530993296.

The previous prime is 664015433. The next prime is 664015481. The reversal of 664015445 is 544510466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664015445 - 2¹² = 664011349 is a prime.

It is a super-2 number, since 2×664015445² = 881833022397096050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13397 + ... + 38826.

It is an arithmetic number, because the mean of its divisors is an integer number (99643392).

Almost surely, 2^664015445 is an apocalyptic number.

It is an amenable number.

664015445 is a deficient number, since it is larger than the sum of its proper divisors (133131691).

664015445 is a wasteful number, since it uses less digits than its factorization.

664015445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54771.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 664015445 is about 25768.4971428293. The cubic root of 664015445 is about 872.4208985138.

The spelling of 664015445 in words is "six hundred sixty-four million, fifteen thousand, four hundred forty-five".