99966671 has 8 divisors (see below), whose sum is σ = 119215104. Its totient is φ = 81960120.

The previous prime is 99966631. The next prime is 99966673. The reversal of 99966671 is 17666999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99966671 - 2²⁶ = 32857807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99966673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310295 + ... + 310616.

It is an arithmetic number, because the mean of its divisors is an integer number (14901888).

Almost surely, 2^99966671 is an apocalyptic number.

99966671 is a deficient number, since it is larger than the sum of its proper divisors (19248433).

99966671 is a wasteful number, since it uses less digits than its factorization.

99966671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620941.

The product of its digits is 1102248, while the sum is 53.

The square root of 99966671 is about 9998.3334111241. Note that the first 3 decimals coincide. The cubic root of 99966671 is about 464.1073111266.

The spelling of 99966671 in words is "ninety-nine million, nine hundred sixty-six thousand, six hundred seventy-one".