66961226 has 8 divisors (see below), whose sum is σ = 100740900. Its totient is φ = 33380928.

The previous prime is 66961217. The next prime is 66961243. The reversal of 66961226 is 62216966.

It can be written as a sum of positive squares in 2 ways, for example, as 66406201 + 555025 = 8149^2 + 745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66961226.

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 in 3 ways as a sum of consecutive naturals, for example, 49001 + ... + 50348.

Almost surely, 2^66961226 is an apocalyptic number.

66961226 is a deficient number, since it is larger than the sum of its proper divisors (33779674).

66961226 is a wasteful number, since it uses less digits than its factorization.

66961226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99688.

The product of its digits is 46656, while the sum is 38.

The square root of 66961226 is about 8182.9839300832. The cubic root of 66961226 is about 406.0764454401.

The spelling of 66961226 in words is "sixty-six million, nine hundred sixty-one thousand, two hundred twenty-six".