10661523625 has 8 divisors (see below), whose sum is σ = 13305581640. Its totient is φ = 8529218800.

The previous prime is 10661523623. The next prime is 10661523641. The reversal of 10661523625 is 52632516601.

It can be written as a sum of positive squares in 4 ways, for example, as 1318561344 + 9342962281 = 36312^2 + 96659^2 .

It is not a de Polignac number, because 10661523625 - 2¹ = 10661523623 is a prime.

It is a super-2 number, since 2×10661523625² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661523623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42645970 + ... + 42646219.

It is an arithmetic number, because the mean of its divisors is an integer number (1663197705).

Almost surely, 2^10661523625 is an apocalyptic number.

It is an amenable number.

10661523625 is a deficient number, since it is larger than the sum of its proper divisors (2644058015).

10661523625 is an frugal number, since it uses more digits than its factorization.

10661523625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85292204 (or 85292194 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 10661523625 in words is "ten billion, six hundred sixty-one million, five hundred twenty-three thousand, six hundred twenty-five".