10661813690 has 32 divisors (see below), whose sum is σ = 21230812800. Its totient is φ = 3822414400.

The previous prime is 10661813689. The next prime is 10661813707. The reversal of 10661813690 is 9631816601.

It is a super-2 number, since 2×10661813690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674765 + ... + 690384.

It is an arithmetic number, because the mean of its divisors is an integer number (663462900).

Almost surely, 2^10661813690 is an apocalyptic number.

10661813690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10661813690 is a deficient number, since it is larger than the sum of its proper divisors (10568999110).

10661813690 is a wasteful number, since it uses less digits than its factorization.

10661813690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365238.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 10661813690 in words is "ten billion, six hundred sixty-one million, eight hundred thirteen thousand, six hundred ninety".