99966697 has 4 divisors (see below), whose sum is σ = 102093696. Its totient is φ = 97839700.

The previous prime is 99966673. The next prime is 99966703. The reversal of 99966697 is 79666999.

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: 79666999 = 4153 ⋅19183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99966697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99966197) 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, 1063429 + ... + 1063522.

It is an arithmetic number, because the mean of its divisors is an integer number (25523424).

Almost surely, 2^99966697 is an apocalyptic number.

It is an amenable number.

99966697 is a deficient number, since it is larger than the sum of its proper divisors (2126999).

99966697 is a wasteful number, since it uses less digits than its factorization.

99966697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126998.

The product of its digits is 9920232, while the sum is 61.

The square root of 99966697 is about 9998.3347113407. The cubic root of 99966697 is about 464.1073513626.

The spelling of 99966697 in words is "ninety-nine million, nine hundred sixty-six thousand, six hundred ninety-seven".