99966677 has 4 divisors (see below), whose sum is σ = 99989580. Its totient is φ = 99943776.

The previous prime is 99966673. The next prime is 99966703. The reversal of 99966677 is 77666999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77666999 = 17 ⋅4568647.

It can be written as a sum of positive squares in 2 ways, for example, as 15437041 + 84529636 = 3929^2 + 9194^2 .

It is a cyclic number.

It is not a de Polignac number, because 99966677 - 2² = 99966673 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (24997395).

Almost surely, 2^99966677 is an apocalyptic number.

It is an amenable number.

99966677 is a deficient number, since it is larger than the sum of its proper divisors (22903).

99966677 is a wasteful number, since it uses less digits than its factorization.

99966677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22902.

The product of its digits is 7715736, while the sum is 59.

The square root of 99966677 is about 9998.3337111741. Note that the first 3 decimals coincide. The cubic root of 99966677 is about 464.1073204118.

It can be divided in two parts, 999 and 66677, that added together give a palindrome (67676).

The spelling of 99966677 in words is "ninety-nine million, nine hundred sixty-six thousand, six hundred seventy-seven".