71605668 has 24 divisors (see below), whose sum is σ = 167311872. Its totient is φ = 23835424.

The previous prime is 71605663. The next prime is 71605687. The reversal of 71605668 is 86650617.

It is not an unprimeable number, because it can be changed into a prime (71605663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5821 + ... + 13307.

It is an arithmetic number, because the mean of its divisors is an integer number (6971328).

Almost surely, 2^71605668 is an apocalyptic number.

It is an amenable number.

71605668 is an abundant number, since it is smaller than the sum of its proper divisors (95706204).

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

71605668 is a wasteful number, since it uses less digits than its factorization.

71605668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8291 (or 8289 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 71605668 is about 8462.0132356313. The cubic root of 71605668 is about 415.2558890243.

The spelling of 71605668 in words is "seventy-one million, six hundred five thousand, six hundred sixty-eight".