66106858 has 8 divisors (see below), whose sum is σ = 100182852. Its totient is φ = 32712576.

The previous prime is 66106813. The next prime is 66106877. The reversal of 66106858 is 85860166.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63632529 + 2474329 = 7977^2 + 1573^2 .

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 66106858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170185 + ... + 170572.

Almost surely, 2^66106858 is an apocalyptic number.

66106858 is a deficient number, since it is larger than the sum of its proper divisors (34075994).

66106858 is a wasteful number, since it uses less digits than its factorization.

66106858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340856.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 66106858 is about 8130.6124000594. The cubic root of 66106858 is about 404.3419848793.

The spelling of 66106858 in words is "sixty-six million, one hundred six thousand, eight hundred fifty-eight".