669088742 has 8 divisors (see below), whose sum is σ = 1147009296. Its totient is φ = 286752312.

The previous prime is 669088709. The next prime is 669088747. The reversal of 669088742 is 247880966.

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

It is a super-2 number, since 2×669088742² = 895359489342285128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669088747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23896013 + ... + 23896040.

It is an arithmetic number, because the mean of its divisors is an integer number (143376162).

Almost surely, 2^669088742 is an apocalyptic number.

669088742 is a deficient number, since it is larger than the sum of its proper divisors (477920554).

669088742 is a wasteful number, since it uses less digits than its factorization.

669088742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47792062.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 669088742 is about 25866.7497378391. The cubic root of 669088742 is about 874.6371249599.

The spelling of 669088742 in words is "six hundred sixty-nine million, eighty-eight thousand, seven hundred forty-two".