671672706 has 8 divisors (see below), whose sum is σ = 1343345424. Its totient is φ = 223890900.

The previous prime is 671672699. The next prime is 671672707. The reversal of 671672706 is 607276176.

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

671672706 is an admirable number.

It is a super-2 number, since 2×671672706² = 902288447970724872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (671672707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55972720 + ... + 55972731.

It is an arithmetic number, because the mean of its divisors is an integer number (167918178).

Almost surely, 2^671672706 is an apocalyptic number.

671672706 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.

671672706 is a wasteful number, since it uses less digits than its factorization.

671672706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111945456.

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 671672706 is about 25916.6492047101. The cubic root of 671672706 is about 875.7616034628.

The spelling of 671672706 in words is "six hundred seventy-one million, six hundred seventy-two thousand, seven hundred six".