99966567 has 16 divisors (see below), whose sum is σ = 138176640. Its totient is φ = 64210272.

The previous prime is 99966557. The next prime is 99966577. The reversal of 99966567 is 76566999.

It is an interprime number because it is at equal distance from previous prime (99966557) and next prime (99966577).

It is not a de Polignac number, because 99966567 - 2¹⁴ = 99950183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99966557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55048 + ... + 56834.

It is an arithmetic number, because the mean of its divisors is an integer number (8636040).

Almost surely, 2^99966567 is an apocalyptic number.

99966567 is a deficient number, since it is larger than the sum of its proper divisors (38210073).

99966567 is a wasteful number, since it uses less digits than its factorization.

99966567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462.

The product of its digits is 5511240, while the sum is 57.

The square root of 99966567 is about 9998.3282102560. The cubic root of 99966567 is about 464.1071501824.

The spelling of 99966567 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred sixty-seven".