9906591106 has 4 divisors (see below), whose sum is σ = 14859886662. Its totient is φ = 4953295552.

The previous prime is 9906591103. The next prime is 9906591109. The reversal of 9906591106 is 6011956099.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9906591103) and next prime (9906591109).

It can be written as a sum of positive squares in only one way, i.e., 9822593881 + 83997225 = 99109^2 + 9165^2 .

It is not an unprimeable number, because it can be changed into a prime (9906591103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2476647775 + ... + 2476647778.

Almost surely, 2^9906591106 is an apocalyptic number.

9906591106 is a deficient number, since it is larger than the sum of its proper divisors (4953295556).

9906591106 is a wasteful number, since it uses less digits than its factorization.

9906591106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953295555.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 9906591106 is about 99531.8597535483. The cubic root of 9906591106 is about 2147.7055823332.

The spelling of 9906591106 in words is "nine billion, nine hundred six million, five hundred ninety-one thousand, one hundred six".