72067751 has 8 divisors (see below), whose sum is σ = 82508160. Its totient is φ = 61663608.

The previous prime is 72067739. The next prime is 72067753. The reversal of 72067751 is 15776027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72067751 - 2¹⁰ = 72066727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72067753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4661 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (10313520).

Almost surely, 2^72067751 is an apocalyptic number.

72067751 is a deficient number, since it is larger than the sum of its proper divisors (10440409).

72067751 is a wasteful number, since it uses less digits than its factorization.

72067751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18133.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 72067751 is about 8489.2727014745. The cubic root of 72067751 is about 416.1472123683.

The spelling of 72067751 in words is "seventy-two million, sixty-seven thousand, seven hundred fifty-one".