671878850 has 12 divisors (see below), whose sum is σ = 1249694754. Its totient is φ = 268751520.

The previous prime is 671878807. The next prime is 671878859. The reversal of 671878850 is 58878176.

It can be written as a sum of positive squares in 3 ways, for example, as 426298609 + 245580241 = 20647^2 + 15671^2 .

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 13437577 = 671878850 / (6 + 7 + 1 + 8 + 7 + 8 + 8 + 5 + 0).

It is not an unprimeable number, because it can be changed into a prime (671878859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6718739 + ... + 6718838.

Almost surely, 2^671878850 is an apocalyptic number.

671878850 is a deficient number, since it is larger than the sum of its proper divisors (577815904).

671878850 is a wasteful number, since it uses less digits than its factorization.

671878850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13437589 (or 13437584 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 50.

The square root of 671878850 is about 25920.6259569479. The cubic root of 671878850 is about 875.8511880340.

The spelling of 671878850 in words is "six hundred seventy-one million, eight hundred seventy-eight thousand, eight hundred fifty".