71051666500 has 48 divisors (see below), whose sum is σ = 157302630576. Its totient is φ = 28031328000.

The previous prime is 71051666461. The next prime is 71051666509. The reversal of 71051666500 is 566615017.

It can be written as a sum of positive squares in 8 ways, for example, as 31565207556 + 39486458944 = 177666^2 + 198712^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71051666500.

It is not an unprimeable number, because it can be changed into a prime (71051666509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 936811 + ... + 1009810.

It is an arithmetic number, because the mean of its divisors is an integer number (3277138137).

Almost surely, 2^71051666500 is an apocalyptic number.

It is an amenable number.

71051666500 is an abundant number, since it is smaller than the sum of its proper divisors (86250964076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71051666500 is a wasteful number, since it uses less digits than its factorization.

71051666500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946713 (or 1946701 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 71051666500 in words is "seventy-one billion, fifty-one million, six hundred sixty-six thousand, five hundred".