38156706666 has 64 divisors (see below), whose sum is σ = 91429430400. Its totient is φ = 11725838208.

The previous prime is 38156706647. The next prime is 38156706677. The reversal of 38156706666 is 66660765183.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534325 + ... + 601511.

It is an arithmetic number, because the mean of its divisors is an integer number (1428584850).

Almost surely, 2^38156706666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38156706666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45714715200).

38156706666 is an abundant number, since it is smaller than the sum of its proper divisors (53272723734).

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

38156706666 is a wasteful number, since it uses less digits than its factorization.

38156706666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68020 (or 68014 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 38156706666 in words is "thirty-eight billion, one hundred fifty-six million, seven hundred six thousand, six hundred sixty-six".