100661026 has 4 divisors (see below), whose sum is σ = 150991542. Its totient is φ = 50330512.

The previous prime is 100661017. The next prime is 100661039. The reversal of 100661026 is 620166001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 100100025 + 561001 = 10005^2 + 749^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 100660988 and 100661006.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25165255 + ... + 25165258.

Almost surely, 2^100661026 is an apocalyptic number.

100661026 is a deficient number, since it is larger than the sum of its proper divisors (50330516).

100661026 is an equidigital number, since it uses as much as digits as its factorization.

100661026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50330515.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 100661026 is about 10032.9968603603. The cubic root of 100661026 is about 465.1793750484.

The spelling of 100661026 in words is "one hundred million, six hundred sixty-one thousand, twenty-six".