99666607 has 2 divisors, whose sum is σ = 99666608. Its totient is φ = 99666606.

The previous prime is 99666601. The next prime is 99666653. The reversal of 99666607 is 70666699.

It is a weak prime.

It is an emirp because it is prime and its reverse (70666699) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99666607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99666601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49833303 + 49833304.

It is an arithmetic number, because the mean of its divisors is an integer number (49833304).

Almost surely, 2^99666607 is an apocalyptic number.

99666607 is a deficient number, since it is larger than the sum of its proper divisors (1).

99666607 is an equidigital number, since it uses as much as digits as its factorization.

99666607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 99666607 is about 9983.3164329295. The cubic root of 99666607 is about 463.6424846477.

The spelling of 99666607 in words is "ninety-nine million, six hundred sixty-six thousand, six hundred seven".