11660650515 has 32 divisors (see below), whose sum is σ = 21631357440. Its totient is φ = 5948620128.

The previous prime is 11660650511. The next prime is 11660650541. The reversal of 11660650515 is 51505606611.

It is not a de Polignac number, because 11660650515 - 2² = 11660650511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11660650515.

It is not an unprimeable number, because it can be changed into a prime (11660650511) 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, 1874617 + ... + 1880826.

It is an arithmetic number, because the mean of its divisors is an integer number (675979920).

Almost surely, 2^11660650515 is an apocalyptic number.

11660650515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11660650515 is a deficient number, since it is larger than the sum of its proper divisors (9970706925).

11660650515 is a wasteful number, since it uses less digits than its factorization.

11660650515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755480 (or 3755474 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 11660650515 in words is "eleven billion, six hundred sixty million, six hundred fifty thousand, five hundred fifteen".