669839287 has 24 divisors (see below), whose sum is σ = 772711632. Its totient is φ = 577075200.

The previous prime is 669839279. The next prime is 669839293. The reversal of 669839287 is 782938966.

It is not a de Polignac number, because 669839287 - 2³ = 669839279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669839257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491487 + ... + 492847.

It is an arithmetic number, because the mean of its divisors is an integer number (32196318).

Almost surely, 2^669839287 is an apocalyptic number.

669839287 is a deficient number, since it is larger than the sum of its proper divisors (102872345).

669839287 is a wasteful number, since it uses less digits than its factorization.

669839287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1522 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The square root of 669839287 is about 25881.2535824678. The cubic root of 669839287 is about 874.9640418420.

The spelling of 669839287 in words is "six hundred sixty-nine million, eight hundred thirty-nine thousand, two hundred eighty-seven".