669178039 has 8 divisors (see below), whose sum is σ = 672811040. Its totient is φ = 665555616.

The previous prime is 669178009. The next prime is 669178063. The reversal of 669178039 is 930871966.

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 669178039 - 2⁹ = 669177527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669177983 and 669178001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669178009) 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, 145822 + ... + 150340.

It is an arithmetic number, because the mean of its divisors is an integer number (84101380).

Almost surely, 2^669178039 is an apocalyptic number.

669178039 is a deficient number, since it is larger than the sum of its proper divisors (3633001).

669178039 is a wasteful number, since it uses less digits than its factorization.

669178039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 669178039 is about 25868.4757765122. The cubic root of 669178039 is about 874.6760331008.

The spelling of 669178039 in words is "six hundred sixty-nine million, one hundred seventy-eight thousand, thirty-nine".