10551866 has 16 divisors (see below), whose sum is σ = 18048744. Its totient is φ = 4583424.

The previous prime is 10551847. The next prime is 10551869. The reversal of 10551866 is 66815501.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6651241 + 3900625 = 2579^2 + 1975^2 .

It is a super-2 number, since 2×10551866² = 222683752163912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10551869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11495 + ... + 12378.

Almost surely, 2^10551866 is an apocalyptic number.

10551866 is a deficient number, since it is larger than the sum of its proper divisors (7496878).

10551866 is a wasteful number, since it uses less digits than its factorization.

10551866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23905.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 10551866 is about 3248.3635880240. The cubic root of 10551866 is about 219.3359175567.

The spelling of 10551866 in words is "ten million, five hundred fifty-one thousand, eight hundred sixty-six".