39666399366693 has 64 divisors (see below), whose sum is σ = 58529682432000. Its totient is φ = 23695318080000.

The previous prime is 39666399366673. The next prime is 39666399366703.

39666399366693 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 39666399366693 - 2¹⁰ = 39666399365669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39666399366623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3703327608 + ... + 3703338318.

It is an arithmetic number, because the mean of its divisors is an integer number (914526288000).

Almost surely, 2^{39666399366693} is an apocalyptic number.

39666399366693 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39666399366693 is a deficient number, since it is larger than the sum of its proper divisors (18863283065307).

39666399366693 is a wasteful number, since it uses less digits than its factorization.

39666399366693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15714.

The product of its digits is 24794911296, while the sum is 84.

The spelling of 39666399366693 in words is "thirty-nine trillion, six hundred sixty-six billion, three hundred ninety-nine million, three hundred sixty-six thousand, six hundred ninety-three".