10661445625 has 10 divisors (see below), whose sum is σ = 13322543234. Its totient is φ = 8529156000.

The previous prime is 10661445607. The next prime is 10661445649. The reversal of 10661445625 is 52654416601.

It can be written as a sum of positive squares in 5 ways, for example, as 1449477184 + 9211968441 = 38072^2 + 95979^2 .

It is not a de Polignac number, because 10661445625 - 2¹³ = 10661437433 is a prime.

It is a super-2 number, since 2×10661445625² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8528532 + ... + 8529781.

Almost surely, 2^10661445625 is an apocalyptic number.

It is an amenable number.

10661445625 is a deficient number, since it is larger than the sum of its proper divisors (2661097609).

10661445625 is an frugal number, since it uses more digits than its factorization.

10661445625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17058333 (or 17058318 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 10661445625 in words is "ten billion, six hundred sixty-one million, four hundred forty-five thousand, six hundred twenty-five".