100666426 has 24 divisors (see below), whose sum is σ = 174313440. Its totient is φ = 42711240.

The previous prime is 100666421. The next prime is 100666429. The reversal of 100666426 is 624666001.

It is a super-2 number, since 2×100666426² = 20267458647226952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100666421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240045 + ... + 240463.

It is an arithmetic number, because the mean of its divisors is an integer number (7263060).

Almost surely, 2^100666426 is an apocalyptic number.

100666426 is a deficient number, since it is larger than the sum of its proper divisors (73647014).

100666426 is an equidigital number, since it uses as much as digits as its factorization.

100666426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 100666426 is about 10033.2659687661. The cubic root of 100666426 is about 465.1876931427.

The spelling of 100666426 in words is "one hundred million, six hundred sixty-six thousand, four hundred twenty-six".