1660210400 has 36 divisors (see below), whose sum is σ = 4052990592. Its totient is φ = 664083840.

The previous prime is 1660210397. The next prime is 1660210451. The reversal of 1660210400 is 40120661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1036832 + ... + 1038431.

It is an arithmetic number, because the mean of its divisors is an integer number (112583072).

Almost surely, 2^1660210400 is an apocalyptic number.

1660210400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660210400 is an abundant number, since it is smaller than the sum of its proper divisors (2392780192).

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

1660210400 is a wasteful number, since it uses less digits than its factorization.

1660210400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075283 (or 2075270 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1660210400 is about 40745.6795255644. The cubic root of 1660210400 is about 1184.0981702750.

The spelling of 1660210400 in words is "one billion, six hundred sixty million, two hundred ten thousand, four hundred".