664131415 has 8 divisors (see below), whose sum is σ = 838902960. Its totient is φ = 503341632.

The previous prime is 664131409. The next prime is 664131421. The reversal of 664131415 is 514131466.

It is an interprime number because it is at equal distance from previous prime (664131409) and next prime (664131421).

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 664131415 - 2¹⁷ = 664000343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3495334 + ... + 3495523.

It is an arithmetic number, because the mean of its divisors is an integer number (104862870).

Almost surely, 2^664131415 is an apocalyptic number.

664131415 is a deficient number, since it is larger than the sum of its proper divisors (174771545).

664131415 is a wasteful number, since it uses less digits than its factorization.

664131415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990881.

The product of its digits is 8640, while the sum is 31.

The square root of 664131415 is about 25770.7472728285. The cubic root of 664131415 is about 872.4716848636.

The spelling of 664131415 in words is "six hundred sixty-four million, one hundred thirty-one thousand, four hundred fifteen".