10666420 has 12 divisors (see below), whose sum is σ = 22399524. Its totient is φ = 4266560.

The previous prime is 10666417. The next prime is 10666421. The reversal of 10666420 is 2466601.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2702736 + 7963684 = 1644^2 + 2822^2 .

It is a super-2 number, since 2×10666420² = 227545031232800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10666421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266641 + ... + 266680.

It is an arithmetic number, because the mean of its divisors is an integer number (1866627).

Almost surely, 2^10666420 is an apocalyptic number.

10666420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10666420 is an abundant number, since it is smaller than the sum of its proper divisors (11733104).

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

10666420 is a wasteful number, since it uses less digits than its factorization.

10666420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533330 (or 533328 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 10666420 is about 3265.9485605257. The cubic root of 10666420 is about 220.1267864228.

The spelling of 10666420 in words is "ten million, six hundred sixty-six thousand, four hundred twenty".