66409060 has 24 divisors (see below), whose sum is σ = 141543360. Its totient is φ = 26166624.

The previous prime is 66409019. The next prime is 66409061. The reversal of 66409060 is 6090466.

It is not an unprimeable number, because it can be changed into a prime (66409061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23440 + ... + 26119.

It is an arithmetic number, because the mean of its divisors is an integer number (5897640).

Almost surely, 2^66409060 is an apocalyptic number.

It is an amenable number.

66409060 is an abundant number, since it is smaller than the sum of its proper divisors (75134300).

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

66409060 is a wasteful number, since it uses less digits than its factorization.

66409060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49635 (or 49633 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66409060 is about 8149.1754184089. The cubic root of 66409060 is about 404.9571869594.

The spelling of 66409060 in words is "sixty-six million, four hundred nine thousand, sixty".