68661792 has 72 divisors (see below), whose sum is σ = 202014540. Its totient is φ = 22095360.

The previous prime is 68661787. The next prime is 68661811. The reversal of 68661792 is 29716686.

It can be written as a sum of positive squares in 2 ways, for example, as 63297936 + 5363856 = 7956^2 + 2316^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4242 + ... + 12462.

Almost surely, 2^68661792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68661792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101007270).

68661792 is an abundant number, since it is smaller than the sum of its proper divisors (133352748).

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

68661792 is a wasteful number, since it uses less digits than its factorization.

68661792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8266 (or 8255 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 68661792 is about 8286.2411261078. The cubic root of 68661792 is about 409.4853586432.

The spelling of 68661792 in words is "sixty-eight million, six hundred sixty-one thousand, seven hundred ninety-two".