72066140 has 48 divisors (see below), whose sum is σ = 155282400. Its totient is φ = 28084992.

The previous prime is 72066139. The next prime is 72066143. The reversal of 72066140 is 4166027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72066143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185066 + ... + 185454.

It is an arithmetic number, because the mean of its divisors is an integer number (3235050).

Almost surely, 2^72066140 is an apocalyptic number.

It is an amenable number.

72066140 is an abundant number, since it is smaller than the sum of its proper divisors (83216260).

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

72066140 is a wasteful number, since it uses less digits than its factorization.

72066140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 72066140 is about 8489.1778164908. The cubic root of 72066140 is about 416.1441114984.

The spelling of 72066140 in words is "seventy-two million, sixty-six thousand, one hundred forty".