669348942 has 16 divisors (see below), whose sum is σ = 1384860240. Its totient is φ = 215422592.

The previous prime is 669348941. The next prime is 669348943. The reversal of 669348942 is 249843966.

It is an interprime number because it is at equal distance from previous prime (669348941) and next prime (669348943).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669348941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1923243 + ... + 1923590.

It is an arithmetic number, because the mean of its divisors is an integer number (86553765).

Almost surely, 2^669348942 is an apocalyptic number.

669348942 is an abundant number, since it is smaller than the sum of its proper divisors (715511298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669348942 is a wasteful number, since it uses less digits than its factorization.

669348942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3846867.

The product of its digits is 2239488, while the sum is 51.

The square root of 669348942 is about 25871.7788719678. The cubic root of 669348942 is about 874.7504886395.

The spelling of 669348942 in words is "six hundred sixty-nine million, three hundred forty-eight thousand, nine hundred forty-two".