71166535642 has 16 divisors (see below), whose sum is σ = 109831012200. Its totient is φ = 34563778560.

The previous prime is 71166535639. The next prime is 71166535691. The reversal of 71166535642 is 24653566117.

It can be written as a sum of positive squares in 4 ways, for example, as 50341448161 + 20825087481 = 224369^2 + 144309^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71166535592 and 71166535601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876167 + ... + 1913722.

Almost surely, 2^71166535642 is an apocalyptic number.

71166535642 is a deficient number, since it is larger than the sum of its proper divisors (38664476558).

71166535642 is a wasteful number, since it uses less digits than its factorization.

71166535642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790161.

The product of its digits is 907200, while the sum is 46.

The spelling of 71166535642 in words is "seventy-one billion, one hundred sixty-six million, five hundred thirty-five thousand, six hundred forty-two".