669268723 has 4 divisors (see below), whose sum is σ = 675895248. Its totient is φ = 662642200.

The previous prime is 669268687. The next prime is 669268729. The reversal of 669268723 is 327862966.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327862966 = 2 ⋅163931483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669268723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669268729) 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, 3313111 + ... + 3313312.

It is an arithmetic number, because the mean of its divisors is an integer number (168973812).

Almost surely, 2^669268723 is an apocalyptic number.

669268723 is a deficient number, since it is larger than the sum of its proper divisors (6626525).

669268723 is a wasteful number, since it uses less digits than its factorization.

669268723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626524.

The product of its digits is 1306368, while the sum is 49.

The square root of 669268723 is about 25870.2285069150. The cubic root of 669268723 is about 874.7155420376.

The spelling of 669268723 in words is "six hundred sixty-nine million, two hundred sixty-eight thousand, seven hundred twenty-three".