71081006677 has 4 divisors (see below), whose sum is σ = 71086750956. Its totient is φ = 71075262400.

The previous prime is 71081006629. The next prime is 71081006701. The reversal of 71081006677 is 77660018017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77660018017 = 12109 ⋅6413413.

It can be written as a sum of positive squares in 2 ways, for example, as 48376242916 + 22704763761 = 219946^2 + 150681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71081006677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71081006177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2853538 + ... + 2878339.

It is an arithmetic number, because the mean of its divisors is an integer number (17771687739).

Almost surely, 2^71081006677 is an apocalyptic number.

It is an amenable number.

71081006677 is a deficient number, since it is larger than the sum of its proper divisors (5744279).

71081006677 is a wasteful number, since it uses less digits than its factorization.

71081006677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5744278.

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 71081006677 in words is "seventy-one billion, eighty-one million, six thousand, six hundred seventy-seven".