669872846 has 4 divisors (see below), whose sum is σ = 1004809272. Its totient is φ = 334936422.

The previous prime is 669872821. The next prime is 669872851. The reversal of 669872846 is 648278966.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 669872791 and 669872800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167468210 + ... + 167468213.

It is an arithmetic number, because the mean of its divisors is an integer number (251202318).

Almost surely, 2^669872846 is an apocalyptic number.

669872846 is a deficient number, since it is larger than the sum of its proper divisors (334936426).

669872846 is a wasteful number, since it uses less digits than its factorization.

669872846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334936425.

The product of its digits is 6967296, while the sum is 56.

The square root of 669872846 is about 25881.9019007491. The cubic root of 669872846 is about 874.9786535201.

The spelling of 669872846 in words is "six hundred sixty-nine million, eight hundred seventy-two thousand, eight hundred forty-six".