669683371 has 4 divisors (see below), whose sum is σ = 765352432. Its totient is φ = 574014312.

The previous prime is 669683323. The next prime is 669683383. The reversal of 669683371 is 173386966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 669683371 - 2¹⁵ = 669650603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669683171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47834520 + ... + 47834533.

It is an arithmetic number, because the mean of its divisors is an integer number (191338108).

Almost surely, 2^669683371 is an apocalyptic number.

669683371 is a deficient number, since it is larger than the sum of its proper divisors (95669061).

669683371 is an equidigital number, since it uses as much as digits as its factorization.

669683371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95669060.

The product of its digits is 979776, while the sum is 49.

The square root of 669683371 is about 25878.2412655884. The cubic root of 669683371 is about 874.8961491986.

The spelling of 669683371 in words is "six hundred sixty-nine million, six hundred eighty-three thousand, three hundred seventy-one".