671998054 has 32 divisors (see below), whose sum is σ = 1265947200. Its totient is φ = 265841856.

The previous prime is 671998039. The next prime is 671998073. The reversal of 671998054 is 450899176.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 671997989 and 671998007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28759 + ... + 46594.

It is an arithmetic number, because the mean of its divisors is an integer number (39560850).

Almost surely, 2^671998054 is an apocalyptic number.

671998054 is a deficient number, since it is larger than the sum of its proper divisors (593949146).

671998054 is a wasteful number, since it uses less digits than its factorization.

671998054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75389 (or 75375 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 671998054 is about 25922.9252593144. The cubic root of 671998054 is about 875.9029824863.

The spelling of 671998054 in words is "six hundred seventy-one million, nine hundred ninety-eight thousand, fifty-four".