1668001140 has 96 divisors (see below), whose sum is σ = 5588540160. Its totient is φ = 410583168.

The previous prime is 1668001129. The next prime is 1668001171. The reversal of 1668001140 is 411008661.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111784 + ... + 125823.

It is an arithmetic number, because the mean of its divisors is an integer number (58213960).

Almost surely, 2^1668001140 is an apocalyptic number.

1668001140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668001140 is an abundant number, since it is smaller than the sum of its proper divisors (3920539020).

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

1668001140 is a wasteful number, since it uses less digits than its factorization.

1668001140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237638 (or 237630 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1668001140 is about 40841.1696698319. The cubic root of 1668001140 is about 1185.9474556961.

The spelling of 1668001140 in words is "one billion, six hundred sixty-eight million, one thousand, one hundred forty".