66196705 has 8 divisors (see below), whose sum is σ = 82175400. Its totient is φ = 51131136.

The previous prime is 66196693. The next prime is 66196723. The reversal of 66196705 is 50769166.

66196705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23464336 + 42732369 = 4844^2 + 6537^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66196705 - 2¹¹ = 66194657 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228120 + ... + 228409.

It is an arithmetic number, because the mean of its divisors is an integer number (10271925).

Almost surely, 2^66196705 is an apocalyptic number.

It is an amenable number.

66196705 is a deficient number, since it is larger than the sum of its proper divisors (15978695).

66196705 is a wasteful number, since it uses less digits than its factorization.

66196705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456563.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 66196705 is about 8136.1357535380. The cubic root of 66196705 is about 404.5250847341.

The spelling of 66196705 in words is "sixty-six million, one hundred ninety-six thousand, seven hundred five".