669614421 has 8 divisors (see below), whose sum is σ = 1020364864. Its totient is φ = 382636800.

The previous prime is 669614417. The next prime is 669614431. The reversal of 669614421 is 124416966.

669614421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 669614421 - 2² = 669614417 is a prime.

It is a super-2 number, since 2×669614421² = 896766945622330482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669614421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669614431) 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, 15943180 + ... + 15943221.

It is an arithmetic number, because the mean of its divisors is an integer number (127545608).

Almost surely, 2^669614421 is an apocalyptic number.

It is an amenable number.

669614421 is a deficient number, since it is larger than the sum of its proper divisors (350750443).

669614421 is a wasteful number, since it uses less digits than its factorization.

669614421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886411.

The product of its digits is 62208, while the sum is 39.

The square root of 669614421 is about 25876.9090310261. The cubic root of 669614421 is about 874.8661219934.

The spelling of 669614421 in words is "six hundred sixty-nine million, six hundred fourteen thousand, four hundred twenty-one".