99668071 has 2 divisors, whose sum is σ = 99668072. Its totient is φ = 99668070.

The previous prime is 99668029. The next prime is 99668077. The reversal of 99668071 is 17086699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99668071 - 2¹⁷ = 99536999 is a prime.

It is a super-2 number, since 2×99668071² = 19867448753722082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99668077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49834035 + 49834036.

It is an arithmetic number, because the mean of its divisors is an integer number (49834036).

Almost surely, 2^99668071 is an apocalyptic number.

99668071 is a deficient number, since it is larger than the sum of its proper divisors (1).

99668071 is an equidigital number, since it uses as much as digits as its factorization.

99668071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 99668071 is about 9983.3897549880. The cubic root of 99668071 is about 463.6447547804.

It can be divided in two parts, 9966 and 8071, that multiplied together give a triangular number (80435586 = T₁₂₆₈₃).

The spelling of 99668071 in words is "ninety-nine million, six hundred sixty-eight thousand, seventy-one".