10661606425 has 12 divisors (see below), whose sum is σ = 13577701036. Its totient is φ = 8298763200.

The previous prime is 10661606411. The next prime is 10661606467. The reversal of 10661606425 is 52460616601.

It can be written as a sum of positive squares in 6 ways, for example, as 2243727424 + 8417879001 = 47368^2 + 91749^2 .

It is not a de Polignac number, because 10661606425 - 2⁵ = 10661606393 is a prime.

It is a super-2 number, since 2×10661606425² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5762106 + ... + 5763955.

Almost surely, 2^10661606425 is an apocalyptic number.

It is an amenable number.

10661606425 is a deficient number, since it is larger than the sum of its proper divisors (2916094611).

10661606425 is a wasteful number, since it uses less digits than its factorization.

10661606425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526108 (or 11526103 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 10661606425 in words is "ten billion, six hundred sixty-one million, six hundred six thousand, four hundred twenty-five".