10666440 has 48 divisors (see below), whose sum is σ = 34667100. Its totient is φ = 2844288.

The previous prime is 10666421. The next prime is 10666441. The reversal of 10666440 is 4466601.

It can be written as a sum of positive squares in 2 ways, for example, as 10381284 + 285156 = 3222^2 + 534^2 .

It is a super-2 number, since 2×10666440² = 227545884547200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10666441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14455 + ... + 15174.

Almost surely, 2^10666440 is an apocalyptic number.

10666440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10666440 is an abundant number, since it is smaller than the sum of its proper divisors (24000660).

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

10666440 is a wasteful number, since it uses less digits than its factorization.

10666440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29646 (or 29639 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 10666440 is about 3265.9516224219. The cubic root of 10666440 is about 220.1269240052.

The spelling of 10666440 in words is "ten million, six hundred sixty-six thousand, four hundred forty".