72987580667 has 4 divisors (see below), whose sum is σ = 73251074016. Its totient is φ = 72724087320.

The previous prime is 72987580663. The next prime is 72987580711. The reversal of 72987580667 is 76608578927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72987580667 - 2² = 72987580663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72987580663) 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, 131746259 + ... + 131746812.

It is an arithmetic number, because the mean of its divisors is an integer number (18312768504).

Almost surely, 2^72987580667 is an apocalyptic number.

72987580667 is a deficient number, since it is larger than the sum of its proper divisors (263493349).

72987580667 is a wasteful number, since it uses less digits than its factorization.

72987580667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263493348.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 72987580667 in words is "seventy-two billion, nine hundred eighty-seven million, five hundred eighty thousand, six hundred sixty-seven".