1913694666 has 96 divisors (see below), whose sum is σ = 4343023104. Its totient is φ = 558230400.

The previous prime is 1913694637. The next prime is 1913694683. The reversal of 1913694666 is 6664963191.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 12189060 + ... + 12189216.

It is an arithmetic number, because the mean of its divisors is an integer number (45239824).

Almost surely, 2^1913694666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913694666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2171511552).

1913694666 is an abundant number, since it is smaller than the sum of its proper divisors (2429328438).

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

1913694666 is a wasteful number, since it uses less digits than its factorization.

1913694666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 277 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 51.

The square root of 1913694666 is about 43745.7959808711. The cubic root of 1913694666 is about 1241.5309450881.

The spelling of 1913694666 in words is "one billion, nine hundred thirteen million, six hundred ninety-four thousand, six hundred sixty-six".