6660715 has 8 divisors (see below), whose sum is σ = 8010288. Its totient is φ = 5316960.

The previous prime is 6660707. The next prime is 6660721. The reversal of 6660715 is 5170666.

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

It is not a de Polignac number, because 6660715 - 2³ = 6660707 is a prime.

It is a super-2 number, since 2×6660715² = 88730248622450, which contains 22 as substring.

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, 1689 + ... + 4021.

It is an arithmetic number, because the mean of its divisors is an integer number (1001286).

Almost surely, 2^6660715 is an apocalyptic number.

6660715 is a deficient number, since it is larger than the sum of its proper divisors (1349573).

6660715 is a wasteful number, since it uses less digits than its factorization.

6660715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6660715 is about 2580.8361048311. The cubic root of 6660715 is about 188.1511817734.

The spelling of 6660715 in words is "six million, six hundred sixty thousand, seven hundred fifteen".