13780766 has 8 divisors (see below), whose sum is σ = 20723904. Its totient is φ = 6872800.

The previous prime is 13780763. The next prime is 13780783. The reversal of 13780766 is 66708731.

13780766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7790 + ... + 9393.

It is an arithmetic number, because the mean of its divisors is an integer number (2590488).

Almost surely, 2^13780766 is an apocalyptic number.

13780766 is a deficient number, since it is larger than the sum of its proper divisors (6943138).

13780766 is a wasteful number, since it uses less digits than its factorization.

13780766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17586.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 13780766 is about 3712.2454121461. The cubic root of 13780766 is about 239.7495419599.

The spelling of 13780766 in words is "thirteen million, seven hundred eighty thousand, seven hundred sixty-six".