72078066 has 32 divisors (see below), whose sum is σ = 160654080. Its totient is φ = 23953968.

The previous prime is 72078059. The next prime is 72078091. The reversal of 72078066 is 66087027.

It is a self number, because there is not a number n which added to its sum of digits gives 72078066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18000 + ... + 21636.

It is an arithmetic number, because the mean of its divisors is an integer number (5020440).

Almost surely, 2^72078066 is an apocalyptic number.

72078066 is an abundant number, since it is smaller than the sum of its proper divisors (88576014).

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

72078066 is a wasteful number, since it uses less digits than its factorization.

72078066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015 (or 4009 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 72078066 is about 8489.8802111691. The cubic root of 72078066 is about 416.1670656945.

The spelling of 72078066 in words is "seventy-two million, seventy-eight thousand, sixty-six".