261103660 has 12 divisors (see below), whose sum is σ = 548317728. Its totient is φ = 104441456.

The previous prime is 261103657. The next prime is 261103673. The reversal of 261103660 is 66301162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6527572 + ... + 6527611.

It is an arithmetic number, because the mean of its divisors is an integer number (45693144).

Almost surely, 2^261103660 is an apocalyptic number.

261103660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261103660 is an abundant number, since it is smaller than the sum of its proper divisors (287214068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261103660 is a wasteful number, since it uses less digits than its factorization.

261103660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13055192 (or 13055190 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 261103660 is about 16158.7022993804. The cubic root of 261103660 is about 639.1522466901.

The spelling of 261103660 in words is "two hundred sixty-one million, one hundred three thousand, six hundred sixty".