671608881 has 32 divisors (see below), whose sum is σ = 1006080000. Its totient is φ = 442777104.

The previous prime is 671608879. The next prime is 671608913. The reversal of 671608881 is 188806176.

It is not a de Polignac number, because 671608881 - 2¹ = 671608879 is a prime.

It is a super-2 number, since 2×671608881² = 902116978076144322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (671608801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1283886 + ... + 1284408.

It is an arithmetic number, because the mean of its divisors is an integer number (31440000).

Almost surely, 2^671608881 is an apocalyptic number.

It is an amenable number.

671608881 is a deficient number, since it is larger than the sum of its proper divisors (334471119).

671608881 is a wasteful number, since it uses less digits than its factorization.

671608881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 671608881 is about 25915.4178241448. The cubic root of 671608881 is about 875.7338631391.

The spelling of 671608881 in words is "six hundred seventy-one million, six hundred eight thousand, eight hundred eighty-one".