10661115225 has 48 divisors (see below), whose sum is σ = 18717784128. Its totient is φ = 5335818240.

The previous prime is 10661115221. The next prime is 10661115253. The reversal of 10661115225 is 52251116601.

It is not a de Polignac number, because 10661115225 - 2² = 10661115221 is a prime.

It is a super-2 number, since 2×10661115225² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10661115192 and 10661115201.

It is not an unprimeable number, because it can be changed into a prime (10661115221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430377 + ... + 454473.

It is an arithmetic number, because the mean of its divisors is an integer number (389953836).

Almost surely, 2^10661115225 is an apocalyptic number.

10661115225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10661115225 is a deficient number, since it is larger than the sum of its proper divisors (8056668903).

10661115225 is a wasteful number, since it uses less digits than its factorization.

10661115225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24474 (or 24469 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 10661115225 in words is "ten billion, six hundred sixty-one million, one hundred fifteen thousand, two hundred twenty-five".