669192877 has 4 divisors (see below), whose sum is σ = 690779776. Its totient is φ = 647605980.

The previous prime is 669192871. The next prime is 669192899. The reversal of 669192877 is 778291966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 669192877 - 2²⁷ = 534975149 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 (669192871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10793403 + ... + 10793464.

It is an arithmetic number, because the mean of its divisors is an integer number (172694944).

Almost surely, 2^669192877 is an apocalyptic number.

It is an amenable number.

669192877 is a deficient number, since it is larger than the sum of its proper divisors (21586899).

669192877 is a wasteful number, since it uses less digits than its factorization.

669192877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21586898.

The product of its digits is 2286144, while the sum is 55.

The square root of 669192877 is about 25868.7625718742. The cubic root of 669192877 is about 874.6824979209.

It can be divided in two parts, 66919 and 2877, that added together give a palindrome (69796).

The spelling of 669192877 in words is "six hundred sixty-nine million, one hundred ninety-two thousand, eight hundred seventy-seven".