669441715 has 4 divisors (see below), whose sum is σ = 803330064. Its totient is φ = 535553368.

The previous prime is 669441709. The next prime is 669441737. The reversal of 669441715 is 517144966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669441715 - 2⁹ = 669441203 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66944167 + ... + 66944176.

It is an arithmetic number, because the mean of its divisors is an integer number (200832516).

Almost surely, 2^669441715 is an apocalyptic number.

669441715 is a deficient number, since it is larger than the sum of its proper divisors (133888349).

669441715 is a wasteful number, since it uses less digits than its factorization.

669441715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133888348.

The product of its digits is 181440, while the sum is 43.

The square root of 669441715 is about 25873.5717480212. The cubic root of 669441715 is about 874.7909007837.

The spelling of 669441715 in words is "six hundred sixty-nine million, four hundred forty-one thousand, seven hundred fifteen".