68661432 has 80 divisors (see below), whose sum is σ = 219803760. Its totient is φ = 19616256.

The previous prime is 68661403. The next prime is 68661433. The reversal of 68661432 is 23416686.

68661432 is a `hidden beast` number, since 6 + 8 + 6 + 614 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68661433) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3033 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (2747547).

Almost surely, 2^68661432 is an apocalyptic number.

It is an amenable number.

68661432 is an abundant number, since it is smaller than the sum of its proper divisors (151142328).

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

68661432 is a wasteful number, since it uses less digits than its factorization.

68661432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15162 (or 15149 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 68661432 is about 8286.2194033226. The cubic root of 68661432 is about 409.4846429857.

The spelling of 68661432 in words is "sixty-eight million, six hundred sixty-one thousand, four hundred thirty-two".