66830105 has 4 divisors (see below), whose sum is σ = 80196132. Its totient is φ = 53464080.

The previous prime is 66830063. The next prime is 66830117. The reversal of 66830105 is 50103866.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34703881 + 32126224 = 5891^2 + 5668^2 .

It is not a de Polignac number, because 66830105 - 2¹² = 66826009 is a prime.

It is a super-2 number, since 2×66830105² = 8932525868622050, which contains 22 as substring.

It is a Duffinian number.

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, 6683006 + ... + 6683015.

It is an arithmetic number, because the mean of its divisors is an integer number (20049033).

Almost surely, 2^66830105 is an apocalyptic number.

It is an amenable number.

66830105 is a deficient number, since it is larger than the sum of its proper divisors (13366027).

66830105 is a wasteful number, since it uses less digits than its factorization.

66830105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13366026.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66830105 is about 8174.9681956568. The cubic root of 66830105 is about 405.8112176116.

The spelling of 66830105 in words is "sixty-six million, eight hundred thirty thousand, one hundred five".