1660038408 has 64 divisors (see below), whose sum is σ = 5269968000. Its totient is φ = 474296256.

The previous prime is 1660038403. The next prime is 1660038421. The reversal of 1660038408 is 8048300661.

It is a happy number.

1660038408 is a `hidden beast` number, since 1 + 6 + 600 + 3 + 8 + 40 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1660038403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547443 + ... + 550466.

It is an arithmetic number, because the mean of its divisors is an integer number (82343250).

Almost surely, 2^1660038408 is an apocalyptic number.

1660038408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1660038408 is an abundant number, since it is smaller than the sum of its proper divisors (3609929592).

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

1660038408 is a wasteful number, since it uses less digits than its factorization.

1660038408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097931 (or 1097921 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1660038408 is about 40743.5689158424. The cubic root of 1660038408 is about 1184.0572793844.

The spelling of 1660038408 in words is "one billion, six hundred sixty million, thirty-eight thousand, four hundred eight".