71686051 has 8 divisors (see below), whose sum is σ = 73211040. Its totient is φ = 70167552.

The previous prime is 71686049. The next prime is 71686061. The reversal of 71686051 is 15068617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71686051 - 2¹ = 71686049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71685998 and 71686016.

It is not an unprimeable number, because it can be changed into a prime (71686061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25315 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (9151380).

Almost surely, 2^71686051 is an apocalyptic number.

71686051 is a deficient number, since it is larger than the sum of its proper divisors (1524989).

71686051 is a wasteful number, since it uses less digits than its factorization.

71686051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 71686051 is about 8466.7615414632. The cubic root of 71686051 is about 415.4112167261.

The spelling of 71686051 in words is "seventy-one million, six hundred eighty-six thousand, fifty-one".