671772054 has 8 divisors (see below), whose sum is σ = 1343544120. Its totient is φ = 223924016.

The previous prime is 671772047. The next prime is 671772097. The reversal of 671772054 is 450277176.

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

671772054 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55980999 + ... + 55981010.

It is an arithmetic number, because the mean of its divisors is an integer number (167943015).

Almost surely, 2^671772054 is an apocalyptic number.

671772054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671772054 is a wasteful number, since it uses less digits than its factorization.

671772054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111962014.

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 671772054 is about 25918.5658168040. The cubic root of 671772054 is about 875.8047796872.

The spelling of 671772054 in words is "six hundred seventy-one million, seven hundred seventy-two thousand, fifty-four".