10666816 has 14 divisors (see below), whose sum is σ = 21167090. Its totient is φ = 5333376.

The previous prime is 10666807. The next prime is 10666823. The reversal of 10666816 is 61866601.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 1081600 = 3096^2 + 1040^2 .

It is a super-2 number, since 2×10666816² = 227561927155712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83271 + ... + 83398.

It is an arithmetic number, because the mean of its divisors is an integer number (1511935).

Almost surely, 2^10666816 is an apocalyptic number.

10666816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10666816 is a deficient number, since it is larger than the sum of its proper divisors (10500274).

10666816 is an equidigital number, since it uses as much as digits as its factorization.

10666816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166681 (or 166671 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 10666816 is about 3266.0091855352. The cubic root of 10666816 is about 220.1295105211.

The spelling of 10666816 in words is "ten million, six hundred sixty-six thousand, eight hundred sixteen".