99966653 has 4 divisors (see below), whose sum is σ = 100753920. Its totient is φ = 99179388.

The previous prime is 99966631. The next prime is 99966673. The reversal of 99966653 is 35666999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35666999 = 79 ⋅451481.

It is a cyclic number.

It is not a de Polignac number, because 99966653 - 2⁶ = 99966589 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 = 99966595 and 99966604.

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 3 ways as a sum of consecutive naturals, for example, 393443 + ... + 393696.

It is an arithmetic number, because the mean of its divisors is an integer number (25188480).

Almost surely, 2^99966653 is an apocalyptic number.

It is an amenable number.

99966653 is a deficient number, since it is larger than the sum of its proper divisors (787267).

99966653 is a wasteful number, since it uses less digits than its factorization.

99966653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787266.

The product of its digits is 2361960, while the sum is 53.

The square root of 99966653 is about 9998.3325109740. The cubic root of 99966653 is about 464.1072832709.

The spelling of 99966653 in words is "ninety-nine million, nine hundred sixty-six thousand, six hundred fifty-three".