71966186045 has 16 divisors (see below), whose sum is σ = 94276468272. Its totient is φ = 52416253440.

The previous prime is 71966185999. The next prime is 71966186059. The reversal of 71966186045 is 54068166917.

It can be written as a sum of positive squares in 8 ways, for example, as 974313796 + 70991872249 = 31214^2 + 266443^2 .

It is not a de Polignac number, because 71966186045 - 2⁸ = 71966185789 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 7578626 + ... + 7588115.

It is an arithmetic number, because the mean of its divisors is an integer number (5892279267).

Almost surely, 2^71966186045 is an apocalyptic number.

It is an amenable number.

71966186045 is a deficient number, since it is larger than the sum of its proper divisors (22310282227).

71966186045 is a wasteful number, since it uses less digits than its factorization.

71966186045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166832.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 71966186045 in words is "seventy-one billion, nine hundred sixty-six million, one hundred eighty-six thousand, forty-five".