10665689961 has 8 divisors (see below), whose sum is σ = 14227120224. Its totient is φ = 7107359840.

The previous prime is 10665689941. The next prime is 10665689963. The reversal of 10665689961 is 16998656601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10665689961 - 2⁵ = 10665689929 is a prime.

It is a super-2 number, since 2×10665689961² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10665689963) 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 7 ways as a sum of consecutive naturals, for example, 766995 + ... + 780776.

It is an arithmetic number, because the mean of its divisors is an integer number (1778390028).

Almost surely, 2^10665689961 is an apocalyptic number.

It is an amenable number.

10665689961 is a deficient number, since it is larger than the sum of its proper divisors (3561430263).

10665689961 is a wasteful number, since it uses less digits than its factorization.

10665689961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550071.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The spelling of 10665689961 in words is "ten billion, six hundred sixty-five million, six hundred eighty-nine thousand, nine hundred sixty-one".