10660640 has 24 divisors (see below), whose sum is σ = 25186140. Its totient is φ = 4264192.

The previous prime is 10660633. The next prime is 10660669. The reversal of 10660640 is 4606601.

It can be written as a sum of positive squares in 2 ways, for example, as 10214416 + 446224 = 3196^2 + 668^2 .

It is a super-2 number, since 2×10660640² = 227298490419200, which contains 22 as substring.

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, 33155 + ... + 33474.

Almost surely, 2^10660640 is an apocalyptic number.

10660640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10660640 is an abundant number, since it is smaller than the sum of its proper divisors (14525500).

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

10660640 is an equidigital number, since it uses as much as digits as its factorization.

10660640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66644 (or 66636 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 10660640 is about 3265.0635522146. The cubic root of 10660640 is about 220.0870179183.

The spelling of 10660640 in words is "ten million, six hundred sixty thousand, six hundred forty".