664091495 has 8 divisors (see below), whose sum is σ = 797165280. Its totient is φ = 531102880.

The previous prime is 664091453. The next prime is 664091501. The reversal of 664091495 is 594190466.

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

It is not a de Polignac number, because 664091495 - 2¹⁶ = 664025959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2651 + ... + 36540.

It is an arithmetic number, because the mean of its divisors is an integer number (99645660).

Almost surely, 2^664091495 is an apocalyptic number.

664091495 is a deficient number, since it is larger than the sum of its proper divisors (133073785).

664091495 is a wasteful number, since it uses less digits than its factorization.

664091495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42585.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 664091495 is about 25769.9727396053. The cubic root of 664091495 is about 872.4542035004.

The spelling of 664091495 in words is "six hundred sixty-four million, ninety-one thousand, four hundred ninety-five".