99666951 has 16 divisors (see below), whose sum is σ = 140528640. Its totient is φ = 62657280.

The previous prime is 99666947. The next prime is 99667003. The reversal of 99666951 is 15966699.

It is not a de Polignac number, because 99666951 - 2² = 99666947 is a prime.

It is a super-2 number, since 2×99666951² = 19867002243272802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99666894 and 99666903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99666911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8791 + ... + 16631.

It is an arithmetic number, because the mean of its divisors is an integer number (8783040).

Almost surely, 2^99666951 is an apocalyptic number.

99666951 is a deficient number, since it is larger than the sum of its proper divisors (40861689).

99666951 is a wasteful number, since it uses less digits than its factorization.

99666951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086.

The product of its digits is 787320, while the sum is 51.

The square root of 99666951 is about 9983.3336616583. Note that the first 3 decimals coincide. The cubic root of 99666951 is about 463.6430180688.

The spelling of 99666951 in words is "ninety-nine million, six hundred sixty-six thousand, nine hundred fifty-one".