12660516101505 has 32 divisors (see below), whose sum is σ = 21448625948928. Its totient is φ = 6355016755200.

The previous prime is 12660516101501. The next prime is 12660516101543. The reversal of 12660516101505 is 50510161506621.

It is not a de Polignac number, because 12660516101505 - 2² = 12660516101501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12660516101501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32641260 + ... + 33026850.

It is an arithmetic number, because the mean of its divisors is an integer number (670269560904).

Almost surely, 2^{12660516101505} is an apocalyptic number.

12660516101505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12660516101505 is a deficient number, since it is larger than the sum of its proper divisors (8788109847423).

12660516101505 is a wasteful number, since it uses less digits than its factorization.

12660516101505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514377.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 12660516101505 in words is "twelve trillion, six hundred sixty billion, five hundred sixteen million, one hundred one thousand, five hundred five".