66731682 has 32 divisors (see below), whose sum is σ = 138991104. Its totient is φ = 21340800.

The previous prime is 66731663. The next prime is 66731689. The reversal of 66731682 is 28613766.

It is a self number, because there is not a number n which added to its sum of digits gives 66731682.

It is not an unprimeable number, because it can be changed into a prime (66731689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12783 + ... + 17229.

It is an arithmetic number, because the mean of its divisors is an integer number (4343472).

Almost surely, 2^66731682 is an apocalyptic number.

66731682 is an abundant number, since it is smaller than the sum of its proper divisors (72259422).

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

66731682 is a wasteful number, since it uses less digits than its factorization.

66731682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554.

The product of its digits is 72576, while the sum is 39.

The square root of 66731682 is about 8168.9461988680. The cubic root of 66731682 is about 405.6119023424.

The spelling of 66731682 in words is "sixty-six million, seven hundred thirty-one thousand, six hundred eighty-two".