3691158661 has 4 divisors (see below), whose sum is σ = 3701440800. Its totient is φ = 3680876524.

The previous prime is 3691158629. The next prime is 3691158689. The reversal of 3691158661 is 1668511963.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3691158661 - 2⁵ = 3691158629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3691158061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5140531 + ... + 5141248.

It is an arithmetic number, because the mean of its divisors is an integer number (925360200).

Almost surely, 2^3691158661 is an apocalyptic number.

It is an amenable number.

3691158661 is a deficient number, since it is larger than the sum of its proper divisors (10282139).

3691158661 is a wasteful number, since it uses less digits than its factorization.

3691158661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282138.

The product of its digits is 233280, while the sum is 46.

The square root of 3691158661 is about 60754.9064767612. The cubic root of 3691158661 is about 1545.4474339393.

The spelling of 3691158661 in words is "three billion, six hundred ninety-one million, one hundred fifty-eight thousand, six hundred sixty-one".