72766171 has 4 divisors (see below), whose sum is σ = 77046552. Its totient is φ = 68485792.

The previous prime is 72766139. The next prime is 72766193. The reversal of 72766171 is 17166727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17166727 = 619 ⋅27733.

It is not a de Polignac number, because 72766171 - 2⁵ = 72766139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72766171.

It is not an unprimeable number, because it can be changed into a prime (72766571) 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, 2140165 + ... + 2140198.

It is an arithmetic number, because the mean of its divisors is an integer number (19261638).

Almost surely, 2^72766171 is an apocalyptic number.

72766171 is a deficient number, since it is larger than the sum of its proper divisors (4280381).

72766171 is a wasteful number, since it uses less digits than its factorization.

72766171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280380.

The product of its digits is 24696, while the sum is 37.

The square root of 72766171 is about 8530.3089627516. The cubic root of 72766171 is about 417.4872091412.

The spelling of 72766171 in words is "seventy-two million, seven hundred sixty-six thousand, one hundred seventy-one".