72665140333550 has 24 divisors (see below), whose sum is σ = 135179527487016. Its totient is φ = 29061246140640.

The previous prime is 72665140333531. The next prime is 72665140333607. The reversal of 72665140333550 is 5533304156627.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119944649 + ... + 120548948.

It is an arithmetic number, because the mean of its divisors is an integer number (5632480311959).

Almost surely, 2^{72665140333550} is an apocalyptic number.

72665140333550 is a deficient number, since it is larger than the sum of its proper divisors (62514387153466).

72665140333550 is a wasteful number, since it uses less digits than its factorization.

72665140333550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240499652 (or 240499647 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 50.

The spelling of 72665140333550 in words is "seventy-two trillion, six hundred sixty-five billion, one hundred forty million, three hundred thirty-three thousand, five hundred fifty".