671775890 has 16 divisors (see below), whose sum is σ = 1248203520. Its totient is φ = 260042160.

The previous prime is 671775883. The next prime is 671775911. The reversal of 671775890 is 98577176.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083200 + ... + 1083819.

It is an arithmetic number, because the mean of its divisors is an integer number (78012720).

Almost surely, 2^671775890 is an apocalyptic number.

671775890 is a deficient number, since it is larger than the sum of its proper divisors (576427630).

671775890 is a wasteful number, since it uses less digits than its factorization.

671775890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167057.

The product of its (nonzero) digits is 740880, while the sum is 50.

The square root of 671775890 is about 25918.6398177065. The cubic root of 671775890 is about 875.8064467114.

The spelling of 671775890 in words is "six hundred seventy-one million, seven hundred seventy-five thousand, eight hundred ninety".