39966399366993 has 24 divisors (see below), whose sum is σ = 62980140446496. Its totient is φ = 24220989504000.

The previous prime is 39966399366977. The next prime is 39966399366997.

39966399366993 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 39966399366993 - 2⁴ = 39966399366977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39966399366997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6668880 + ... + 11153777.

It is an arithmetic number, because the mean of its divisors is an integer number (2624172518604).

Almost surely, 2^{39966399366993} is an apocalyptic number.

39966399366993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39966399366993 is a deficient number, since it is larger than the sum of its proper divisors (23013741079503).

39966399366993 is a wasteful number, since it uses less digits than its factorization.

39966399366993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17845325 (or 17845322 counting only the distinct ones).

The product of its digits is 55788550416, while the sum is 90.

The spelling of 39966399366993 in words is "thirty-nine trillion, nine hundred sixty-six billion, three hundred ninety-nine million, three hundred sixty-six thousand, nine hundred ninety-three".