72270066 has 32 divisors (see below), whose sum is σ = 158760000. Its totient is φ = 21750080.

The previous prime is 72270061. The next prime is 72270097. The reversal of 72270066 is 66007227.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72270061) 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, 6160 + ... + 13508.

It is an arithmetic number, because the mean of its divisors is an integer number (4961250).

Almost surely, 2^72270066 is an apocalyptic number.

72270066 is an abundant number, since it is smaller than the sum of its proper divisors (86489934).

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

72270066 is a wasteful number, since it uses less digits than its factorization.

72270066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 72270066 is about 8501.1802709977. The cubic root of 72270066 is about 416.5362636902.

The spelling of 72270066 in words is "seventy-two million, two hundred seventy thousand, sixty-six".