664044045 has 32 divisors (see below), whose sum is σ = 1217798400. Its totient is φ = 302676480.

The previous prime is 664044019. The next prime is 664044061. The reversal of 664044045 is 540440466.

It is not a de Polignac number, because 664044045 - 2⁷ = 664043917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664043997 and 664044015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27585 + ... + 45705.

It is an arithmetic number, because the mean of its divisors is an integer number (38056200).

Almost surely, 2^664044045 is an apocalyptic number.

It is an amenable number.

664044045 is a deficient number, since it is larger than the sum of its proper divisors (553754355).

664044045 is a wasteful number, since it uses less digits than its factorization.

664044045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18485.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 664044045 is about 25769.0520780257. The cubic root of 664044045 is about 872.4334237643.

The spelling of 664044045 in words is "six hundred sixty-four million, forty-four thousand, forty-five".