66949087 has 2 divisors, whose sum is σ = 66949088. Its totient is φ = 66949086.

The previous prime is 66949079. The next prime is 66949117. The reversal of 66949087 is 78094966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66949087 - 2³ = 66949079 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66949087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66949007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33474543 + 33474544.

It is an arithmetic number, because the mean of its divisors is an integer number (33474544).

Almost surely, 2^66949087 is an apocalyptic number.

66949087 is a deficient number, since it is larger than the sum of its proper divisors (1).

66949087 is an equidigital number, since it uses as much as digits as its factorization.

66949087 is an odious number, because the sum of its binary digits is odd.

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

The square root of 66949087 is about 8182.2421743676. The cubic root of 66949087 is about 406.0519055674.

The spelling of 66949087 in words is "sixty-six million, nine hundred forty-nine thousand, eighty-seven".