408608666620 has 72 divisors (see below), whose sum is σ = 1088915592240. Its totient is φ = 127358542080.

The previous prime is 408608666593. The next prime is 408608666629. The reversal of 408608666620 is 26666806804.

It is a super-2 number, since 2×408608666620² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408608666629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18941385 + ... + 18962944.

It is an arithmetic number, because the mean of its divisors is an integer number (15123827670).

Almost surely, 2^408608666620 is an apocalyptic number.

It is an amenable number.

408608666620 is an abundant number, since it is smaller than the sum of its proper divisors (680306925620).

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

408608666620 is a wasteful number, since it uses less digits than its factorization.

408608666620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37904363 (or 37904354 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 408608666620 in words is "four hundred eight billion, six hundred eight million, six hundred sixty-six thousand, six hundred twenty".