6131661 has 16 divisors (see below), whose sum is σ = 8702400. Its totient is φ = 3829248.

The previous prime is 6131651. The next prime is 6131663. The reversal of 6131661 is 1661316.

It is not a de Polignac number, because 6131661 - 2⁶ = 6131597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6131663) 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, 4975 + ... + 6083.

It is an arithmetic number, because the mean of its divisors is an integer number (543900).

Almost surely, 2^6131661 is an apocalyptic number.

It is an amenable number.

6131661 is a deficient number, since it is larger than the sum of its proper divisors (2570739).

6131661 is a wasteful number, since it uses less digits than its factorization.

6131661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228.

The product of its digits is 648, while the sum is 24.

The square root of 6131661 is about 2476.2190936991. The cubic root of 6131661 is about 183.0315870108.

Adding to 6131661 its reverse (1661316), we get a palindrome (7792977).

The spelling of 6131661 in words is "six million, one hundred thirty-one thousand, six hundred sixty-one".