672153668 has 6 divisors (see below), whose sum is σ = 1176268926. Its totient is φ = 336076832.

The previous prime is 672153659. The next prime is 672153697. The reversal of 672153668 is 866351276.

It can be written as a sum of positive squares in only one way, i.e., 484792324 + 187361344 = 22018^2 + 13688^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84019205 + ... + 84019212.

It is an arithmetic number, because the mean of its divisors is an integer number (196044821).

Almost surely, 2^672153668 is an apocalyptic number.

It is an amenable number.

672153668 is a deficient number, since it is larger than the sum of its proper divisors (504115258).

672153668 is a wasteful number, since it uses less digits than its factorization.

672153668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168038421 (or 168038419 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 672153668 is about 25925.9265601058. The cubic root of 672153668 is about 875.9705879632.

The spelling of 672153668 in words is "six hundred seventy-two million, one hundred fifty-three thousand, six hundred sixty-eight".