72533726766 has 24 divisors (see below), whose sum is σ = 158922213840. Its totient is φ = 23906246496.

The previous prime is 72533726761. The next prime is 72533726791. The reversal of 72533726766 is 66762733527.

It is a super-2 number, since 2×72533726766² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72533726761) 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, 22636890 + ... + 22640093.

It is an arithmetic number, because the mean of its divisors is an integer number (6621758910).

Almost surely, 2^72533726766 is an apocalyptic number.

72533726766 is an abundant number, since it is smaller than the sum of its proper divisors (86388487074).

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

72533726766 is a wasteful number, since it uses less digits than its factorization.

72533726766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45277080 (or 45277077 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 54.

The spelling of 72533726766 in words is "seventy-two billion, five hundred thirty-three million, seven hundred twenty-six thousand, seven hundred sixty-six".