6611889091 has 2 divisors, whose sum is σ = 6611889092. Its totient is φ = 6611889090.

The previous prime is 6611889083. The next prime is 6611889107. The reversal of 6611889091 is 1909881166.

It is a happy number.

6611889091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6611889091 - 2³ = 6611889083 is a prime.

It is not a weakly prime, because it can be changed into another prime (6611889061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305944545 + 3305944546.

It is an arithmetic number, because the mean of its divisors is an integer number (3305944546).

Almost surely, 2^6611889091 is an apocalyptic number.

6611889091 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611889091 is an equidigital number, since it uses as much as digits as its factorization.

6611889091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 6611889091 is about 81313.5234201544. The cubic root of 6611889091 is about 1876.9031074495.

The spelling of 6611889091 in words is "six billion, six hundred eleven million, eight hundred eighty-nine thousand, ninety-one".