72566718 has 16 divisors (see below), whose sum is σ = 165866880. Its totient is φ = 20733336.

The previous prime is 72566717. The next prime is 72566737. The reversal of 72566718 is 81766527.

It is a super-2 number, since 2×72566718² = 10531857122583048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1727779 = 72566718 / (7 + 2 + 5 + 6 + 6 + 7 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 72566718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72566713) 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, 863848 + ... + 863931.

It is an arithmetic number, because the mean of its divisors is an integer number (10366680).

Almost surely, 2^72566718 is an apocalyptic number.

72566718 is an abundant number, since it is smaller than the sum of its proper divisors (93300162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72566718 is a wasteful number, since it uses less digits than its factorization.

72566718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727791.

The product of its digits is 141120, while the sum is 42.

The square root of 72566718 is about 8518.6100978974. The cubic root of 72566718 is about 417.1054141771.

The spelling of 72566718 in words is "seventy-two million, five hundred sixty-six thousand, seven hundred eighteen".