99963665 has 8 divisors (see below), whose sum is σ = 121747200. Its totient is φ = 78777072.

The previous prime is 99963659. The next prime is 99963673. The reversal of 99963665 is 56636999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99963665 - 2⁶ = 99963601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148865 + ... + 149534.

It is an arithmetic number, because the mean of its divisors is an integer number (15218400).

Almost surely, 2^99963665 is an apocalyptic number.

It is an amenable number.

99963665 is a deficient number, since it is larger than the sum of its proper divisors (21783535).

99963665 is a wasteful number, since it uses less digits than its factorization.

99963665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298471.

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

The square root of 99963665 is about 9998.1830849410. The cubic root of 99963665 is about 464.1026591743.

The spelling of 99963665 in words is "ninety-nine million, nine hundred sixty-three thousand, six hundred sixty-five".