11778671 has 4 divisors (see below), whose sum is σ = 12471552. Its totient is φ = 11085792.

The previous prime is 11778661. The next prime is 11778707. The reversal of 11778671 is 17687711.

11778671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11778671 - 2⁶ = 11778607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778631) 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, 346415 + ... + 346448.

It is an arithmetic number, because the mean of its divisors is an integer number (3117888).

Almost surely, 2^11778671 is an apocalyptic number.

11778671 is a deficient number, since it is larger than the sum of its proper divisors (692881).

11778671 is an equidigital number, since it uses as much as digits as its factorization.

11778671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692880.

The product of its digits is 16464, while the sum is 38.

The square root of 11778671 is about 3432.0068473125. The cubic root of 11778671 is about 227.5265581039.

The spelling of 11778671 in words is "eleven million, seven hundred seventy-eight thousand, six hundred seventy-one".