87666199 has 2 divisors, whose sum is σ = 87666200. Its totient is φ = 87666198.

The previous prime is 87666181. The next prime is 87666203. The reversal of 87666199 is 99166678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87666199 - 2¹³ = 87658007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87666119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43833099 + 43833100.

It is an arithmetic number, because the mean of its divisors is an integer number (43833100).

Almost surely, 2^87666199 is an apocalyptic number.

87666199 is a deficient number, since it is larger than the sum of its proper divisors (1).

87666199 is an equidigital number, since it uses as much as digits as its factorization.

87666199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 87666199 is about 9363.0229626975. The cubic root of 87666199 is about 444.2329064410.

The spelling of 87666199 in words is "eighty-seven million, six hundred sixty-six thousand, one hundred ninety-nine".