10661512518 has 32 divisors (see below), whose sum is σ = 24093820800. Its totient is φ = 3493601928.

The previous prime is 10661512517. The next prime is 10661512523. The reversal of 10661512518 is 81521516601.

10661512518 is a `hidden beast` number, since 1 + 0 + 6 + 615 + 1 + 25 + 18 = 666.

It is a super-2 number, since 2×10661512518² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661512517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669996 + ... + 1676367.

It is an arithmetic number, because the mean of its divisors is an integer number (752931900).

Almost surely, 2^10661512518 is an apocalyptic number.

10661512518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10661512518 is an abundant number, since it is smaller than the sum of its proper divisors (13432308282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10661512518 is a wasteful number, since it uses less digits than its factorization.

10661512518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346433 (or 3346427 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The spelling of 10661512518 in words is "ten billion, six hundred sixty-one million, five hundred twelve thousand, five hundred eighteen".