669831458 has 4 divisors (see below), whose sum is σ = 1004747190. Its totient is φ = 334915728.

The previous prime is 669831457. The next prime is 669831479. The reversal of 669831458 is 854138966.

669831458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 854138966 = 2 ⋅427069483.

It can be written as a sum of positive squares in only one way, i.e., 506835169 + 162996289 = 22513^2 + 12767^2 .

It is not an unprimeable number, because it can be changed into a prime (669831457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167457863 + ... + 167457866.

Almost surely, 2^669831458 is an apocalyptic number.

669831458 is a deficient number, since it is larger than the sum of its proper divisors (334915732).

669831458 is a wasteful number, since it uses less digits than its factorization.

669831458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334915731.

The product of its digits is 1244160, while the sum is 50.

The square root of 669831458 is about 25881.1023335560. The cubic root of 669831458 is about 874.9606330044.

The spelling of 669831458 in words is "six hundred sixty-nine million, eight hundred thirty-one thousand, four hundred fifty-eight".