99990006665 has 8 divisors (see below), whose sum is σ = 119989707720. Its totient is φ = 79990872192.

The previous prime is 99990006643. The next prime is 99990006671. The reversal of 99990006665 is 56660009999.

It can be written as a sum of positive squares in 4 ways, for example, as 879003904 + 99111002761 = 29648^2 + 314819^2 .

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 99990006665 - 2¹⁴ = 99989990281 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, 593141 + ... + 742829.

It is an arithmetic number, because the mean of its divisors is an integer number (14998713465).

Almost surely, 2^99990006665 is an apocalyptic number.

It is an amenable number.

99990006665 is a deficient number, since it is larger than the sum of its proper divisors (19999701055).

99990006665 is a wasteful number, since it uses less digits than its factorization.

99990006665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283291.

The product of its (nonzero) digits is 7085880, while the sum is 59.

The spelling of 99990006665 in words is "ninety-nine billion, nine hundred ninety million, six thousand, six hundred sixty-five".