72166126 has 16 divisors (see below), whose sum is σ = 111855744. Its totient is φ = 34897464.

The previous prime is 72166117. The next prime is 72166141. The reversal of 72166126 is 62166127.

It is a happy number.

It is a congruent 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, 4785 + ... + 12931.

It is an arithmetic number, because the mean of its divisors is an integer number (6990984).

Almost surely, 2^72166126 is an apocalyptic number.

72166126 is a deficient number, since it is larger than the sum of its proper divisors (39689618).

72166126 is a wasteful number, since it uses less digits than its factorization.

72166126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295.

The product of its digits is 6048, while the sum is 31.

The square root of 72166126 is about 8495.0648025780. The cubic root of 72166126 is about 416.3364781081.

Subtracting from 72166126 its reverse (62166127), we obtain a palindrome (9999999).

The spelling of 72166126 in words is "seventy-two million, one hundred sixty-six thousand, one hundred twenty-six".