668774469 has 8 divisors (see below), whose sum is σ = 972762912. Its totient is φ = 405317840.

The previous prime is 668774459. The next prime is 668774479. The reversal of 668774469 is 964477866.

It is a happy number.

668774469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668774459) and next prime (668774479).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668774469 - 2⁵ = 668774437 is a prime.

It is a super-2 number, since 2×668774469² = 894518580772463922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668774419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10132914 + ... + 10132979.

It is an arithmetic number, because the mean of its divisors is an integer number (121595364).

Almost surely, 2^668774469 is an apocalyptic number.

It is an amenable number.

668774469 is a deficient number, since it is larger than the sum of its proper divisors (303988443).

668774469 is a wasteful number, since it uses less digits than its factorization.

668774469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20265907.

The product of its digits is 12192768, while the sum is 57.

The square root of 668774469 is about 25860.6741791470. The cubic root of 668774469 is about 874.5001636155.

The spelling of 668774469 in words is "six hundred sixty-eight million, seven hundred seventy-four thousand, four hundred sixty-nine".