669141929 has 8 divisors (see below), whose sum is σ = 695928960. Its totient is φ = 642812976.

The previous prime is 669141919. The next prime is 669142021. The reversal of 669141929 is 929141966.

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 669141929 - 2⁸ = 669141673 is a prime.

It is a super-2 number, since 2×669141929² = 895501842291682082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669141919) 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, 111539 + ... + 117384.

It is an arithmetic number, because the mean of its divisors is an integer number (86991120).

Almost surely, 2^669141929 is an apocalyptic number.

It is an amenable number.

669141929 is a deficient number, since it is larger than the sum of its proper divisors (26787031).

669141929 is a wasteful number, since it uses less digits than its factorization.

669141929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229039.

The product of its digits is 209952, while the sum is 47.

The square root of 669141929 is about 25867.7778133337. Note that the first 3 decimals coincide. The cubic root of 669141929 is about 874.6602998091.

The spelling of 669141929 in words is "six hundred sixty-nine million, one hundred forty-one thousand, nine hundred twenty-nine".