39666309697 has 16 divisors (see below), whose sum is σ = 46034265600. Its totient is φ = 33476889600.

The previous prime is 39666309689. The next prime is 39666309751. The reversal of 39666309697 is 79690366693.

It is not a de Polignac number, because 39666309697 - 2³ = 39666309689 is a prime.

It is a super-2 number, since 2×39666309697² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39666309677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15697 + ... + 282097.

It is an arithmetic number, because the mean of its divisors is an integer number (2877141600).

Almost surely, 2^39666309697 is an apocalyptic number.

It is an amenable number.

39666309697 is a deficient number, since it is larger than the sum of its proper divisors (6367955903).

39666309697 is a wasteful number, since it uses less digits than its factorization.

39666309697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266736.

The product of its (nonzero) digits is 59521392, while the sum is 64.

The spelling of 39666309697 in words is "thirty-nine billion, six hundred sixty-six million, three hundred nine thousand, six hundred ninety-seven".