71552781066 has 32 divisors (see below), whose sum is σ = 154124264448. Its totient is φ = 22014728640.

The previous prime is 71552781031. The next prime is 71552781107. The reversal of 71552781066 is 66018725517.

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, 1763095 + ... + 1803221.

It is an arithmetic number, because the mean of its divisors is an integer number (4816383264).

Almost surely, 2^71552781066 is an apocalyptic number.

71552781066 is an abundant number, since it is smaller than the sum of its proper divisors (82571483382).

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

71552781066 is a wasteful number, since it uses less digits than its factorization.

71552781066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63006.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 71552781066 in words is "seventy-one billion, five hundred fifty-two million, seven hundred eighty-one thousand, sixty-six".