669866914 has 4 divisors (see below), whose sum is σ = 1004800374. Its totient is φ = 334933456.

The previous prime is 669866887. The next prime is 669866917. The reversal of 669866914 is 419668966.

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

It can be written as a sum of positive squares in only one way, i.e., 545923225 + 123943689 = 23365^2 + 11133^2 .

It is not an unprimeable number, because it can be changed into a prime (669866917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167466727 + ... + 167466730.

Almost surely, 2^669866914 is an apocalyptic number.

669866914 is a deficient number, since it is larger than the sum of its proper divisors (334933460).

669866914 is a wasteful number, since it uses less digits than its factorization.

669866914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334933459.

The product of its digits is 3359232, while the sum is 55.

The square root of 669866914 is about 25881.7873030438. The cubic root of 669866914 is about 874.9760707470.

The spelling of 669866914 in words is "six hundred sixty-nine million, eight hundred sixty-six thousand, nine hundred fourteen".