664325047 has 6 divisors (see below), whose sum is σ = 682766448. Its totient is φ = 646368984.

The previous prime is 664325041. The next prime is 664325059. The reversal of 664325047 is 740523466.

It is not a de Polignac number, because 664325047 - 2¹¹ = 664322999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664324997 and 664325015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664325041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 241263 + ... + 244000.

It is an arithmetic number, because the mean of its divisors is an integer number (113794408).

Almost surely, 2^664325047 is an apocalyptic number.

664325047 is a deficient number, since it is larger than the sum of its proper divisors (18441401).

664325047 is an equidigital number, since it uses as much as digits as its factorization.

664325047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485337 (or 485300 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 664325047 is about 25774.5038167566. The cubic root of 664325047 is about 872.5564682954.

The spelling of 664325047 in words is "six hundred sixty-four million, three hundred twenty-five thousand, forty-seven".