66440060 has 12 divisors (see below), whose sum is σ = 139524168. Its totient is φ = 26576016.

The previous prime is 66440021. The next prime is 66440071. The reversal of 66440060 is 6004466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660982 + ... + 1661021.

It is an arithmetic number, because the mean of its divisors is an integer number (11627014).

Almost surely, 2^66440060 is an apocalyptic number.

It is an amenable number.

66440060 is an abundant number, since it is smaller than the sum of its proper divisors (73084108).

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

66440060 is a wasteful number, since it uses less digits than its factorization.

66440060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322012 (or 3322010 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66440060 is about 8151.0772294219. The cubic root of 66440060 is about 405.0201890053.

The spelling of 66440060 in words is "sixty-six million, four hundred forty thousand, sixty".