669276563 has 4 divisors (see below), whose sum is σ = 698375568. Its totient is φ = 640177560.

The previous prime is 669276551. The next prime is 669276583. The reversal of 669276563 is 365672966.

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

It is a cyclic number.

It is not a de Polignac number, because 669276563 - 2⁶ = 669276499 is a prime.

It is a super-2 number, since 2×669276563² = 895862235562185938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669276583) 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, 14549468 + ... + 14549513.

It is an arithmetic number, because the mean of its divisors is an integer number (174593892).

Almost surely, 2^669276563 is an apocalyptic number.

669276563 is a deficient number, since it is larger than the sum of its proper divisors (29099005).

669276563 is a wasteful number, since it uses less digits than its factorization.

669276563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29099004.

The product of its digits is 2449440, while the sum is 50.

The square root of 669276563 is about 25870.3800319980. The cubic root of 669276563 is about 874.7189575780.

The spelling of 669276563 in words is "six hundred sixty-nine million, two hundred seventy-six thousand, five hundred sixty-three".