9091661799 has 16 divisors (see below), whose sum is σ = 13250240640. Its totient is φ = 5499262560.

The previous prime is 9091661797. The next prime is 9091661801. The reversal of 9091661799 is 9971661909.

It is an interprime number because it is at equal distance from previous prime (9091661797) and next prime (9091661801).

It is not a de Polignac number, because 9091661799 - 2¹ = 9091661797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9091661797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253837 + ... + 287430.

It is an arithmetic number, because the mean of its divisors is an integer number (828140040).

Almost surely, 2^9091661799 is an apocalyptic number.

9091661799 is a deficient number, since it is larger than the sum of its proper divisors (4158578841).

9091661799 is a wasteful number, since it uses less digits than its factorization.

9091661799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541790.

The product of its (nonzero) digits is 1653372, while the sum is 57.

The square root of 9091661799 is about 95350.2060773861. The cubic root of 9091661799 is about 2087.1216223327.

The spelling of 9091661799 in words is "nine billion, ninety-one million, six hundred sixty-one thousand, seven hundred ninety-nine".