99766655 has 4 divisors (see below), whose sum is σ = 119719992. Its totient is φ = 79813320.

The previous prime is 99766633. The next prime is 99766673. The reversal of 99766655 is 55666799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55666799 = 137 ⋅406327.

It is a de Polignac number, because none of the positive numbers 2^k-99766655 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99766597 and 99766606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9976661 + ... + 9976670.

It is an arithmetic number, because the mean of its divisors is an integer number (29929998).

Almost surely, 2^99766655 is an apocalyptic number.

99766655 is a deficient number, since it is larger than the sum of its proper divisors (19953337).

99766655 is a wasteful number, since it uses less digits than its factorization.

99766655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19953336.

The product of its digits is 3061800, while the sum is 53.

The square root of 99766655 is about 9988.3259358113. The cubic root of 99766655 is about 463.7975716657.

The spelling of 99766655 in words is "ninety-nine million, seven hundred sixty-six thousand, six hundred fifty-five".