12660771 has 16 divisors (see below), whose sum is σ = 17466624. Its totient is φ = 8151264.

The previous prime is 12660763. The next prime is 12660779. The reversal of 12660771 is 17706621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12660763) and next prime (12660779).

It is not a de Polignac number, because 12660771 - 2³ = 12660763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12660779) 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, 18196 + ... + 18878.

It is an arithmetic number, because the mean of its divisors is an integer number (1091664).

Almost surely, 2^12660771 is an apocalyptic number.

12660771 is a deficient number, since it is larger than the sum of its proper divisors (4805853).

12660771 is a wasteful number, since it uses less digits than its factorization.

12660771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 12660771 is about 3558.1977179465. The cubic root of 12660771 is about 233.0701833802.

It can be divided in two parts, 12660 and 771, that added together give a palindrome (13431).

The spelling of 12660771 in words is "twelve million, six hundred sixty thousand, seven hundred seventy-one".