6640825315 has 8 divisors (see below), whose sum is σ = 7971321600. Its totient is φ = 5311106112.

The previous prime is 6640825291. The next prime is 6640825339. The reversal of 6640825315 is 5135280466.

It is an interprime number because it is at equal distance from previous prime (6640825291) and next prime (6640825339).

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 6640825315 - 2⁵ = 6640825283 is a prime.

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, 175299 + ... + 209788.

It is an arithmetic number, because the mean of its divisors is an integer number (996415200).

Almost surely, 2^6640825315 is an apocalyptic number.

6640825315 is a deficient number, since it is larger than the sum of its proper divisors (1330496285).

6640825315 is a wasteful number, since it uses less digits than its factorization.

6640825315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388541.

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 6640825315 is about 81491.2591324984. The cubic root of 6640825315 is about 1879.6371446792.

The spelling of 6640825315 in words is "six billion, six hundred forty million, eight hundred twenty-five thousand, three hundred fifteen".