66408801 has 16 divisors (see below), whose sum is σ = 89766144. Its totient is φ = 43666064.

The previous prime is 66408761. The next prime is 66408877. The reversal of 66408801 is 10880466.

It is a cyclic number.

It is not a de Polignac number, because 66408801 - 2⁶ = 66408737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66408101) 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, 141970 + ... + 142436.

It is an arithmetic number, because the mean of its divisors is an integer number (5610384).

Almost surely, 2^66408801 is an apocalyptic number.

It is an amenable number.

66408801 is a deficient number, since it is larger than the sum of its proper divisors (23357343).

66408801 is a wasteful number, since it uses less digits than its factorization.

66408801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 66408801 is about 8149.1595272151. The cubic root of 66408801 is about 404.9566605049.

The spelling of 66408801 in words is "sixty-six million, four hundred eight thousand, eight hundred one".