664473186433 has 4 divisors (see below), whose sum is σ = 759397927360. Its totient is φ = 569548445508.

The previous prime is 664473186401. The next prime is 664473186479. The reversal of 664473186433 is 334681374466.

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 not a de Polignac number, because 664473186433 - 2⁵ = 664473186401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664473186133) 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, 47462370453 + ... + 47462370466.

It is an arithmetic number, because the mean of its divisors is an integer number (189849481840).

Almost surely, 2^664473186433 is an apocalyptic number.

It is an amenable number.

664473186433 is a deficient number, since it is larger than the sum of its proper divisors (94924740927).

664473186433 is an equidigital number, since it uses as much as digits as its factorization.

664473186433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94924740926.

The product of its digits is 20901888, while the sum is 55.

The spelling of 664473186433 in words is "six hundred sixty-four billion, four hundred seventy-three million, one hundred eighty-six thousand, four hundred thirty-three".