664152438 has 8 divisors (see below), whose sum is σ = 1328304888. Its totient is φ = 221384144.

The previous prime is 664152427. The next prime is 664152449. The reversal of 664152438 is 834251466.

It is an interprime number because it is at equal distance from previous prime (664152427) and next prime (664152449).

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

664152438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 664152396 and 664152405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55346031 + ... + 55346042.

It is an arithmetic number, because the mean of its divisors is an integer number (166038111).

Almost surely, 2^664152438 is an apocalyptic number.

664152438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664152438 is a wasteful number, since it uses less digits than its factorization.

664152438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110692078.

The product of its digits is 138240, while the sum is 39.

The square root of 664152438 is about 25771.1551545522. The cubic root of 664152438 is about 872.4808907619.

The spelling of 664152438 in words is "six hundred sixty-four million, one hundred fifty-two thousand, four hundred thirty-eight".