1966091268 has 12 divisors (see below), whose sum is σ = 4587546320. Its totient is φ = 655363752.

The previous prime is 1966091251. The next prime is 1966091273. The reversal of 1966091268 is 8621906691.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81920458 + ... + 81920481.

Almost surely, 2^1966091268 is an apocalyptic number.

It is an amenable number.

1966091268 is an abundant number, since it is smaller than the sum of its proper divisors (2621455052).

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

1966091268 is a wasteful number, since it uses less digits than its factorization.

1966091268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163840946 (or 163840944 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1966091268 is about 44340.6277357459. The cubic root of 1966091268 is about 1252.7600384382.

The spelling of 1966091268 in words is "one billion, nine hundred sixty-six million, ninety-one thousand, two hundred sixty-eight".