669324853 has 4 divisors (see below), whose sum is σ = 669383788. Its totient is φ = 669265920.

The previous prime is 669324847. The next prime is 669324907. The reversal of 669324853 is 358423966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 358423966 = 2 ⋅179211983.

It can be written as a sum of positive squares in 2 ways, for example, as 194825764 + 474499089 = 13958^2 + 21783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669324853 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 (669324823) 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, 6426 + ... + 37147.

It is an arithmetic number, because the mean of its divisors is an integer number (167345947).

Almost surely, 2^669324853 is an apocalyptic number.

It is an amenable number.

669324853 is a deficient number, since it is larger than the sum of its proper divisors (58935).

669324853 is a wasteful number, since it uses less digits than its factorization.

669324853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58934.

The product of its digits is 933120, while the sum is 46.

The square root of 669324853 is about 25871.3133219015. The cubic root of 669324853 is about 874.7399948018.

The spelling of 669324853 in words is "six hundred sixty-nine million, three hundred twenty-four thousand, eight hundred fifty-three".