100556660 has 12 divisors (see below), whose sum is σ = 211169028. Its totient is φ = 40222656.

The previous prime is 100556657. The next prime is 100556663. The reversal of 100556660 is 66655001.

It is an interprime number because it is at equal distance from previous prime (100556657) and next prime (100556663).

It can be written as a sum of positive squares in 2 ways, for example, as 57365476 + 43191184 = 7574^2 + 6572^2 .

It is a super-2 number, since 2×100556660² = 20223283740711200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100556663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513897 + ... + 2513936.

It is an arithmetic number, because the mean of its divisors is an integer number (17597419).

Almost surely, 2^100556660 is an apocalyptic number.

100556660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100556660 is an abundant number, since it is smaller than the sum of its proper divisors (110612368).

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

100556660 is a wasteful number, since it uses less digits than its factorization.

100556660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027842 (or 5027840 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 100556660 is about 10027.7943736397. The cubic root of 100556660 is about 465.0185524644.

The spelling of 100556660 in words is "one hundred million, five hundred fifty-six thousand, six hundred sixty".