665002513 has 4 divisors (see below), whose sum is σ = 760002880. Its totient is φ = 570002148.

The previous prime is 665002463. The next prime is 665002529. The reversal of 665002513 is 315200566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665002513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665002553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47500173 + ... + 47500186.

It is an arithmetic number, because the mean of its divisors is an integer number (190000720).

Almost surely, 2^665002513 is an apocalyptic number.

It is an amenable number.

665002513 is a deficient number, since it is larger than the sum of its proper divisors (95000367).

665002513 is an equidigital number, since it uses as much as digits as its factorization.

665002513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95000366.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 665002513 is about 25787.6426413893. The cubic root of 665002513 is about 872.8529730043.

The spelling of 665002513 in words is "six hundred sixty-five million, two thousand, five hundred thirteen".