1930401666 has 64 divisors (see below), whose sum is σ = 4508380800. Its totient is φ = 611489088.

The previous prime is 1930401631. The next prime is 1930401727. The reversal of 1930401666 is 6661040391.

It is a self number, because there is not a number n which added to its sum of digits gives 1930401666.

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, 74680 + ... + 97148.

It is an arithmetic number, because the mean of its divisors is an integer number (70443450).

Almost surely, 2^1930401666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1930401666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2254190400).

1930401666 is an abundant number, since it is smaller than the sum of its proper divisors (2577979134).

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

1930401666 is a wasteful number, since it uses less digits than its factorization.

1930401666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22560 (or 22554 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1930401666 is about 43936.3365109109. The cubic root of 1930401666 is about 1245.1334332238.

The spelling of 1930401666 in words is "one billion, nine hundred thirty million, four hundred one thousand, six hundred sixty-six".