669245297 has 4 divisors (see below), whose sum is σ = 764851776. Its totient is φ = 573638820.

The previous prime is 669245263. The next prime is 669245321. The reversal of 669245297 is 792542966.

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 669245297 - 2⁸ = 669245041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669244297) 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, 47803229 + ... + 47803242.

It is an arithmetic number, because the mean of its divisors is an integer number (191212944).

Almost surely, 2^669245297 is an apocalyptic number.

It is an amenable number.

669245297 is a deficient number, since it is larger than the sum of its proper divisors (95606479).

669245297 is an equidigital number, since it uses as much as digits as its factorization.

669245297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95606478.

The product of its digits is 1632960, while the sum is 50.

The square root of 669245297 is about 25869.7757431331. The cubic root of 669245297 is about 874.7053362091.

The spelling of 669245297 in words is "six hundred sixty-nine million, two hundred forty-five thousand, two hundred ninety-seven".