72783563166 has 24 divisors (see below), whose sum is σ = 157954999800. Its totient is φ = 24221606256.

The previous prime is 72783563161. The next prime is 72783563201. The reversal of 72783563166 is 66136538727.

72783563166 is a `hidden beast` number, since 7 + 2 + 78 + 3 + 563 + 1 + 6 + 6 = 666.

It is a super-2 number, since 2×72783563166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72783563161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3287116 + ... + 3309183.

It is an arithmetic number, because the mean of its divisors is an integer number (6581458325).

Almost surely, 2^72783563166 is an apocalyptic number.

72783563166 is an abundant number, since it is smaller than the sum of its proper divisors (85171436634).

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

72783563166 is a wasteful number, since it uses less digits than its factorization.

72783563166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6596920 (or 6596917 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 72783563166 in words is "seventy-two billion, seven hundred eighty-three million, five hundred sixty-three thousand, one hundred sixty-six".