66408488 has 32 divisors (see below), whose sum is σ = 128785800. Its totient is φ = 32078592.

The previous prime is 66408487. The next prime is 66408491. The reversal of 66408488 is 88480466.

It can be written as a sum of positive squares in 4 ways, for example, as 49252324 + 17156164 = 7018^2 + 4142^2 .

It is a super-2 number, since 2×66408488² = 8820174556892288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66408481) 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, 45758 + ... + 47186.

Almost surely, 2^66408488 is an apocalyptic number.

It is an amenable number.

66408488 is a deficient number, since it is larger than the sum of its proper divisors (62377312).

66408488 is a wasteful number, since it uses less digits than its factorization.

66408488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 66408488 is about 8149.1403227580. The cubic root of 66408488 is about 404.9560242858.

The spelling of 66408488 in words is "sixty-six million, four hundred eight thousand, four hundred eighty-eight".