669169419 has 16 divisors (see below), whose sum is σ = 945312768. Its totient is φ = 419603072.

The previous prime is 669169411. The next prime is 669169427. The reversal of 669169419 is 914961966.

It is an interprime number because it is at equal distance from previous prime (669169411) and next prime (669169427).

It is a cyclic number.

It is not a de Polignac number, because 669169419 - 2³ = 669169411 is a prime.

It is a super-2 number, since 2×669169419² = 895575422649595122, which contains 22 as substring.

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 Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (669169411) 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 15 ways as a sum of consecutive naturals, for example, 103294 + ... + 109580.

It is an arithmetic number, because the mean of its divisors is an integer number (59082048).

Almost surely, 2^669169419 is an apocalyptic number.

669169419 is a deficient number, since it is larger than the sum of its proper divisors (276143349).

669169419 is a wasteful number, since it uses less digits than its factorization.

669169419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8394.

The product of its digits is 629856, while the sum is 51.

The square root of 669169419 is about 25868.3091639171. The cubic root of 669169419 is about 874.6722773789.

The spelling of 669169419 in words is "six hundred sixty-nine million, one hundred sixty-nine thousand, four hundred nineteen".