669568277 has 8 divisors (see below), whose sum is σ = 770289792. Its totient is φ = 570114000.

The previous prime is 669568267. The next prime is 669568283. The reversal of 669568277 is 772865966.

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

It is a cyclic number.

It is not a de Polignac number, because 669568277 - 2¹⁶ = 669502741 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 (669568217) 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, 315674 + ... + 317787.

It is an arithmetic number, because the mean of its divisors is an integer number (96286224).

Almost surely, 2^669568277 is an apocalyptic number.

It is an amenable number.

669568277 is a deficient number, since it is larger than the sum of its proper divisors (100721515).

669568277 is a wasteful number, since it uses less digits than its factorization.

669568277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633619.

The product of its digits is 7620480, while the sum is 56.

The square root of 669568277 is about 25876.0174099493. The cubic root of 669568277 is about 874.8460254780.

The spelling of 669568277 in words is "six hundred sixty-nine million, five hundred sixty-eight thousand, two hundred seventy-seven".