669715 has 8 divisors (see below), whose sum is σ = 851040. Its totient is φ = 504192.

The previous prime is 669707. The next prime is 669733. The reversal of 669715 is 517966.

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 669715 - 2³ = 669707 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, 3855 + ... + 4024.

It is an arithmetic number, because the mean of its divisors is an integer number (106380).

2⁶⁶⁹⁷¹⁵ is an apocalyptic number.

669715 is a deficient number, since it is larger than the sum of its proper divisors (181325).

669715 is a wasteful number, since it uses less digits than its factorization.

669715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7901.

The product of its digits is 11340, while the sum is 34.

The square root of 669715 is about 818.3611672116. The cubic root of 669715 is about 87.4909922700.

The spelling of 669715 in words is "six hundred sixty-nine thousand, seven hundred fifteen".