671899766 has 8 divisors (see below), whose sum is σ = 1040361024. Its totient is φ = 325112760.

The previous prime is 671899763. The next prime is 671899799. The reversal of 671899766 is 667998176.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671899763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5418485 + ... + 5418608.

It is an arithmetic number, because the mean of its divisors is an integer number (130045128).

Almost surely, 2^671899766 is an apocalyptic number.

671899766 is a deficient number, since it is larger than the sum of its proper divisors (368461258).

671899766 is a wasteful number, since it uses less digits than its factorization.

671899766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10837126.

The product of its digits is 6858432, while the sum is 59.

The square root of 671899766 is about 25921.0294162867. The cubic root of 671899766 is about 875.8602765342.

The spelling of 671899766 in words is "six hundred seventy-one million, eight hundred ninety-nine thousand, seven hundred sixty-six".