1329065766 has 128 divisors (see below), whose sum is σ = 3512678400. Its totient is φ = 364452480.

The previous prime is 1329065719. The next prime is 1329065779. The reversal of 1329065766 is 6675609231.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2882776 + ... + 2883236.

It is an arithmetic number, because the mean of its divisors is an integer number (27442800).

Almost surely, 2^1329065766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1329065766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1756339200).

1329065766 is an abundant number, since it is smaller than the sum of its proper divisors (2183612634).

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

1329065766 is a wasteful number, since it uses less digits than its factorization.

1329065766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 1329065766 is about 36456.3542609515. The cubic root of 1329065766 is about 1099.4668948451.

The spelling of 1329065766 in words is "one billion, three hundred twenty-nine million, sixty-five thousand, seven hundred sixty-six".