39372379866 has 12 divisors (see below), whose sum is σ = 85306823082. Its totient is φ = 13124126616.

The previous prime is 39372379819. The next prime is 39372379867. The reversal of 39372379866 is 66897327393.

39372379866 is a `hidden beast` number, since 393 + 7 + 237 + 9 + 8 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 30898256841 + 8474123025 = 175779^2 + 92055^2 .

It is a super-3 number, since 3×39372379866³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (39372379867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1093677201 + ... + 1093677236.

Almost surely, 2^39372379866 is an apocalyptic number.

39372379866 is an abundant number, since it is smaller than the sum of its proper divisors (45934443216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39372379866 is a wasteful number, since it uses less digits than its factorization.

39372379866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2187354445 (or 2187354442 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 63.

The spelling of 39372379866 in words is "thirty-nine billion, three hundred seventy-two million, three hundred seventy-nine thousand, eight hundred sixty-six".