672556166 has 4 divisors (see below), whose sum is σ = 1008834252. Its totient is φ = 336278082.

The previous prime is 672556123. The next prime is 672556187. The reversal of 672556166 is 661655276.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168139040 + ... + 168139043.

It is an arithmetic number, because the mean of its divisors is an integer number (252208563).

Almost surely, 2^672556166 is an apocalyptic number.

672556166 is a deficient number, since it is larger than the sum of its proper divisors (336278086).

672556166 is a wasteful number, since it uses less digits than its factorization.

672556166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336278085.

The product of its digits is 453600, while the sum is 44.

The square root of 672556166 is about 25933.6878596161. The cubic root of 672556166 is about 876.1454021828.

The spelling of 672556166 in words is "six hundred seventy-two million, five hundred fifty-six thousand, one hundred sixty-six".