10401866 has 4 divisors (see below), whose sum is σ = 15602802. Its totient is φ = 5200932.

The previous prime is 10401863. The next prime is 10401883. The reversal of 10401866 is 66810401.

10401866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66810401 = 7 ⋅9544343.

It can be written as a sum of positive squares in only one way, i.e., 8826841 + 1575025 = 2971^2 + 1255^2 .

It is not an unprimeable number, because it can be changed into a prime (10401863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600465 + ... + 2600468.

Almost surely, 2^10401866 is an apocalyptic number.

10401866 is a deficient number, since it is larger than the sum of its proper divisors (5200936).

10401866 is an equidigital number, since it uses as much as digits as its factorization.

10401866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200935.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 10401866 is about 3225.1923973617. The cubic root of 10401866 is about 218.2916305695.

The spelling of 10401866 in words is "ten million, four hundred one thousand, eight hundred sixty-six".