66609795 has 32 divisors (see below), whose sum is σ = 124641792. Its totient is φ = 29740032.

The previous prime is 66609779. The next prime is 66609797. The reversal of 66609795 is 59790666.

66609795 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66609795 - 2⁴ = 66609779 is a prime.

It is a super-4 number, since 4×66609795⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (66609797) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2862 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (3895056).

Almost surely, 2^66609795 is an apocalyptic number.

66609795 is a deficient number, since it is larger than the sum of its proper divisors (58031997).

66609795 is a wasteful number, since it uses less digits than its factorization.

66609795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 66609795 is about 8161.4824021130. The cubic root of 66609795 is about 405.3647985809.

The spelling of 66609795 in words is "sixty-six million, six hundred nine thousand, seven hundred ninety-five".