669276481 has 4 divisors (see below), whose sum is σ = 670257072. Its totient is φ = 668295892.

The previous prime is 669276473. The next prime is 669276499. The reversal of 669276481 is 184672966.

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 669276481 - 2³ = 669276473 is a prime.

It is a super-2 number, since 2×669276481² = 895862016039486722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669276401) 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, 489271 + ... + 490636.

It is an arithmetic number, because the mean of its divisors is an integer number (167564268).

Almost surely, 2^669276481 is an apocalyptic number.

It is an amenable number.

669276481 is a deficient number, since it is larger than the sum of its proper divisors (980591).

669276481 is an equidigital number, since it uses as much as digits as its factorization.

669276481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980590.

The product of its digits is 870912, while the sum is 49.

The square root of 669276481 is about 25870.3784471739. The cubic root of 669276481 is about 874.7189218544.

The spelling of 669276481 in words is "six hundred sixty-nine million, two hundred seventy-six thousand, four hundred eighty-one".