91866667 has 2 divisors, whose sum is σ = 91866668. Its totient is φ = 91866666.

The previous prime is 91866661. The next prime is 91866679. The reversal of 91866667 is 76666819.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91866667 - 2¹⁵ = 91833899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91866667.

It is not a weakly prime, because it can be changed into another prime (91866661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45933333 + 45933334.

It is an arithmetic number, because the mean of its divisors is an integer number (45933334).

Almost surely, 2^91866667 is an apocalyptic number.

91866667 is a deficient number, since it is larger than the sum of its proper divisors (1).

91866667 is an equidigital number, since it uses as much as digits as its factorization.

91866667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 91866667 is about 9584.7100634291. The cubic root of 91866667 is about 451.2175537529.

The spelling of 91866667 in words is "ninety-one million, eight hundred sixty-six thousand, six hundred sixty-seven".