71681705 has 16 divisors (see below), whose sum is σ = 88724160. Its totient is φ = 55568448.

The previous prime is 71681689. The next prime is 71681713. The reversal of 71681705 is 50718617.

It is a cyclic number.

It is not a de Polignac number, because 71681705 - 2⁴ = 71681689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20366 + ... + 23624.

It is an arithmetic number, because the mean of its divisors is an integer number (5545260).

Almost surely, 2^71681705 is an apocalyptic number.

It is an amenable number.

71681705 is a deficient number, since it is larger than the sum of its proper divisors (17042455).

71681705 is a wasteful number, since it uses less digits than its factorization.

71681705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 71681705 is about 8466.5048869058. The cubic root of 71681705 is about 415.4028217241.

The spelling of 71681705 in words is "seventy-one million, six hundred eighty-one thousand, seven hundred five".