12761661 has 16 divisors (see below), whose sum is σ = 18643968. Its totient is φ = 7700400.

The previous prime is 12761659. The next prime is 12761663. The reversal of 12761661 is 16616721.

It is an interprime number because it is at equal distance from previous prime (12761659) and next prime (12761663).

It is not a de Polignac number, because 12761661 - 2¹ = 12761659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12761663) 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 15 ways as a sum of consecutive naturals, for example, 8230 + ... + 9656.

It is an arithmetic number, because the mean of its divisors is an integer number (1165248).

Almost surely, 2^12761661 is an apocalyptic number.

12761661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12761661 is a deficient number, since it is larger than the sum of its proper divisors (5882307).

12761661 is a wasteful number, since it uses less digits than its factorization.

12761661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712.

The product of its digits is 3024, while the sum is 30.

The square root of 12761661 is about 3572.3467076979. The cubic root of 12761661 is about 233.6876356643.

The spelling of 12761661 in words is "twelve million, seven hundred sixty-one thousand, six hundred sixty-one".