72126668 has 24 divisors (see below), whose sum is σ = 129230640. Its totient is φ = 35214080.

The previous prime is 72126617. The next prime is 72126671. The reversal of 72126668 is 86662127.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28328 + ... + 30768.

It is an arithmetic number, because the mean of its divisors is an integer number (5384610).

Almost surely, 2^72126668 is an apocalyptic number.

It is an amenable number.

72126668 is a deficient number, since it is larger than the sum of its proper divisors (57103972).

72126668 is a wasteful number, since it uses less digits than its factorization.

72126668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2615 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 72126668 is about 8492.7420777980. The cubic root of 72126668 is about 416.2605847002.

The spelling of 72126668 in words is "seventy-two million, one hundred twenty-six thousand, six hundred sixty-eight".