665447315 has 8 divisors (see below), whose sum is σ = 859962768. Its totient is φ = 491407200.

The previous prime is 665447309. The next prime is 665447323. The reversal of 665447315 is 513744566.

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

It is a de Polignac number, because none of the positive numbers 2^k-665447315 is a prime.

It is a Duffinian 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, 5118761 + ... + 5118890.

It is an arithmetic number, because the mean of its divisors is an integer number (107495346).

Almost surely, 2^665447315 is an apocalyptic number.

665447315 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

665447315 is a deficient number, since it is larger than the sum of its proper divisors (194515453).

665447315 is a wasteful number, since it uses less digits than its factorization.

665447315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237669.

The product of its digits is 302400, while the sum is 41.

The square root of 665447315 is about 25796.2655242963. The cubic root of 665447315 is about 873.0475387942.

The spelling of 665447315 in words is "six hundred sixty-five million, four hundred forty-seven thousand, three hundred fifteen".