392684778066 has 64 divisors (see below), whose sum is σ = 920071249920. Its totient is φ = 109400151360.

The previous prime is 392684778053. The next prime is 392684778067. The reversal of 392684778066 is 660877486293.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 392684777988 and 392684778006.

It is not an unprimeable number, because it can be changed into a prime (392684778067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161251 + ... + 900761.

It is an arithmetic number, because the mean of its divisors is an integer number (14376113280).

Almost surely, 2^392684778066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 392684778066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460035624960).

392684778066 is an abundant number, since it is smaller than the sum of its proper divisors (527386471854).

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

392684778066 is a wasteful number, since it uses less digits than its factorization.

392684778066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739839.

The product of its (nonzero) digits is 146313216, while the sum is 66.

The spelling of 392684778066 in words is "three hundred ninety-two billion, six hundred eighty-four million, seven hundred seventy-eight thousand, sixty-six".