669019329 has 24 divisors (see below), whose sum is σ = 1059761664. Its totient is φ = 403332000.

The previous prime is 669019303. The next prime is 669019381. The reversal of 669019329 is 923910966.

It is a happy number.

It is not a de Polignac number, because 669019329 - 2⁸ = 669019073 is a prime.

It is a super-2 number, since 2×669019329² = 895173725151220482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669019399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1219 + ... + 36599.

It is an arithmetic number, because the mean of its divisors is an integer number (44156736).

Almost surely, 2^669019329 is an apocalyptic number.

It is an amenable number.

669019329 is a deficient number, since it is larger than the sum of its proper divisors (390742335).

669019329 is a wasteful number, since it uses less digits than its factorization.

669019329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35589 (or 35586 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 669019329 is about 25865.4079612134. The cubic root of 669019329 is about 874.6068782066.

The spelling of 669019329 in words is "six hundred sixty-nine million, nineteen thousand, three hundred twenty-nine".