10665880 has 16 divisors (see below), whose sum is σ = 23998320. Its totient is φ = 4266336.

The previous prime is 10665857. The next prime is 10665901. The reversal of 10665880 is 8856601.

It is a happy number.

It is a super-2 number, since 2×10665880² = 227521992348800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133284 + ... + 133363.

It is an arithmetic number, because the mean of its divisors is an integer number (1499895).

Almost surely, 2^10665880 is an apocalyptic number.

10665880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10665880 is an abundant number, since it is smaller than the sum of its proper divisors (13332440).

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

10665880 is a wasteful number, since it uses less digits than its factorization.

10665880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266658 (or 266654 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 10665880 is about 3265.8658882446. The cubic root of 10665880 is about 220.1230716347.

The spelling of 10665880 in words is "ten million, six hundred sixty-five thousand, eight hundred eighty".