72566970387 has 16 divisors (see below), whose sum is σ = 103425251328. Its totient is φ = 45145939520.

The previous prime is 72566970373. The next prime is 72566970407. The reversal of 72566970387 is 78307966527.

It is a cyclic number.

It is not a de Polignac number, because 72566970387 - 2¹⁴ = 72566954003 is a prime.

It is a super-2 number, since 2×72566970387² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72566970387.

It is not an unprimeable number, because it can be changed into a prime (72566970317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12822723 + ... + 12828380.

It is an arithmetic number, because the mean of its divisors is an integer number (6464078208).

Almost surely, 2^72566970387 is an apocalyptic number.

72566970387 is a deficient number, since it is larger than the sum of its proper divisors (30858280941).

72566970387 is a wasteful number, since it uses less digits than its factorization.

72566970387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651170.

The product of its (nonzero) digits is 26671680, while the sum is 60.

The spelling of 72566970387 in words is "seventy-two billion, five hundred sixty-six million, nine hundred seventy thousand, three hundred eighty-seven".