669803597 has 4 divisors (see below), whose sum is σ = 670922400. Its totient is φ = 668684796.

The previous prime is 669803591. The next prime is 669803653. The reversal of 669803597 is 795308966.

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, and also an emirpimes, since its reverse is a distinct semiprime: 795308966 = 2 ⋅397654483.

It is a cyclic number.

It is not a de Polignac number, because 669803597 - 2¹⁴ = 669787213 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 (669803591) 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, 558503 + ... + 559700.

It is an arithmetic number, because the mean of its divisors is an integer number (167730600).

Almost surely, 2^669803597 is an apocalyptic number.

It is an amenable number.

669803597 is a deficient number, since it is larger than the sum of its proper divisors (1118803).

669803597 is a wasteful number, since it uses less digits than its factorization.

669803597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118802.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 669803597 is about 25880.5640780876. The cubic root of 669803597 is about 874.9485017855.

The spelling of 669803597 in words is "six hundred sixty-nine million, eight hundred three thousand, five hundred ninety-seven".