669258497 has 4 divisors (see below), whose sum is σ = 669336240. Its totient is φ = 669180756.

The previous prime is 669258449. The next prime is 669258503. The reversal of 669258497 is 794852966.

It is a happy number.

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 669258497 - 2⁸ = 669258241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669258437) 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, 24083 + ... + 43800.

It is an arithmetic number, because the mean of its divisors is an integer number (167334060).

Almost surely, 2^669258497 is an apocalyptic number.

It is an amenable number.

669258497 is a deficient number, since it is larger than the sum of its proper divisors (77743).

669258497 is an equidigital number, since it uses as much as digits as its factorization.

669258497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77742.

The product of its digits is 6531840, while the sum is 56.

The square root of 669258497 is about 25870.0308658494. The cubic root of 669258497 is about 874.7110869827.

The spelling of 669258497 in words is "six hundred sixty-nine million, two hundred fifty-eight thousand, four hundred ninety-seven".