9901691066 has 8 divisors (see below), whose sum is σ = 15168548160. Its totient is φ = 4845508348.

The previous prime is 9901691057. The next prime is 9901691071. The reversal of 9901691066 is 6601961099.

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

It is a Harshad number since it is a multiple of its sum of digits (47).

9901691066 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9901691066.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52668476 + ... + 52668663.

It is an arithmetic number, because the mean of its divisors is an integer number (1896068520).

Almost surely, 2^9901691066 is an apocalyptic number.

9901691066 is a deficient number, since it is larger than the sum of its proper divisors (5266857094).

9901691066 is a wasteful number, since it uses less digits than its factorization.

9901691066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105337188.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 9901691066 is about 99507.2412741907. The cubic root of 9901691066 is about 2147.3514215278.

The spelling of 9901691066 in words is "nine billion, nine hundred one million, six hundred ninety-one thousand, sixty-six".