10218666 has 16 divisors (see below), whose sum is σ = 21639744. Its totient is φ = 3205824.

The previous prime is 10218653. The next prime is 10218679. The reversal of 10218666 is 66681201.

It is an interprime number because it is at equal distance from previous prime (10218653) and next prime (10218679).

It is a super-2 number, since 2×10218666² = 208842269639112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49990 + ... + 50193.

It is an arithmetic number, because the mean of its divisors is an integer number (1352484).

Almost surely, 2^10218666 is an apocalyptic number.

10218666 is an abundant number, since it is smaller than the sum of its proper divisors (11421078).

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

10218666 is a wasteful number, since it uses less digits than its factorization.

10218666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100205.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 10218666 is about 3196.6648244694. The cubic root of 10218666 is about 217.0024987855.

Adding to 10218666 its reverse (66681201), we get a palindrome (76899867).

The spelling of 10218666 in words is "ten million, two hundred eighteen thousand, six hundred sixty-six".