669688827 has 8 divisors (see below), whose sum is σ = 905495040. Its totient is φ = 440170920.

The previous prime is 669688813. The next prime is 669688841. The reversal of 669688827 is 728886966.

It is an interprime number because it is at equal distance from previous prime (669688813) and next prime (669688841).

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

It is not a de Polignac number, because 669688827 - 2¹¹ = 669686779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669688897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571827 + ... + 1572252.

It is an arithmetic number, because the mean of its divisors is an integer number (113186880).

Almost surely, 2^669688827 is an apocalyptic number.

669688827 is a deficient number, since it is larger than the sum of its proper divisors (235806213).

669688827 is a wasteful number, since it uses less digits than its factorization.

669688827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144153.

The product of its digits is 13934592, while the sum is 60.

The square root of 669688827 is about 25878.3466821202. The cubic root of 669688827 is about 874.8985251575.

The spelling of 669688827 in words is "six hundred sixty-nine million, six hundred eighty-eight thousand, eight hundred twenty-seven".