66271688 has 16 divisors (see below), whose sum is σ = 142010880. Its totient is φ = 28402128.

The previous prime is 66271687. The next prime is 66271693. The reversal of 66271688 is 88617266.

It is not an unprimeable number, because it can be changed into a prime (66271687) 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, 591656 + ... + 591767.

It is an arithmetic number, because the mean of its divisors is an integer number (8875680).

Almost surely, 2^66271688 is an apocalyptic number.

It is an amenable number.

66271688 is an abundant number, since it is smaller than the sum of its proper divisors (75739192).

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

66271688 is a wasteful number, since it uses less digits than its factorization.

66271688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183436 (or 1183432 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 66271688 is about 8140.7424722810. The cubic root of 66271688 is about 404.6777663456.

The spelling of 66271688 in words is "sixty-six million, two hundred seventy-one thousand, six hundred eighty-eight".