72881506966 has 4 divisors (see below), whose sum is σ = 109322260452. Its totient is φ = 36440753482.

The previous prime is 72881506949. The next prime is 72881506987. The reversal of 72881506966 is 66960518827.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72881506966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18220376740 + ... + 18220376743.

It is an arithmetic number, because the mean of its divisors is an integer number (27330565113).

Almost surely, 2^72881506966 is an apocalyptic number.

72881506966 is a deficient number, since it is larger than the sum of its proper divisors (36440753486).

72881506966 is a wasteful number, since it uses less digits than its factorization.

72881506966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36440753485.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 72881506966 in words is "seventy-two billion, eight hundred eighty-one million, five hundred six thousand, nine hundred sixty-six".