6166189987 has 2 divisors, whose sum is σ = 6166189988. Its totient is φ = 6166189986.

The previous prime is 6166189973. The next prime is 6166190033. The reversal of 6166189987 is 7899816616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6166189987 - 2¹¹ = 6166187939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6166189387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3083094993 + 3083094994.

It is an arithmetic number, because the mean of its divisors is an integer number (3083094994).

Almost surely, 2^6166189987 is an apocalyptic number.

6166189987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6166189987 is an equidigital number, since it uses as much as digits as its factorization.

6166189987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 61.

The square root of 6166189987 is about 78525.0914485300. The cubic root of 6166189987 is about 1833.7451036482.

The spelling of 6166189987 in words is "six billion, one hundred sixty-six million, one hundred eighty-nine thousand, nine hundred eighty-seven".