66131562 has 32 divisors (see below), whose sum is σ = 152635392. Its totient is φ = 18710064.

The previous prime is 66131561. The next prime is 66131573. The reversal of 66131562 is 26513166.

It is not an unprimeable number, because it can be changed into a prime (66131561) 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, 3318 + ... + 11969.

It is an arithmetic number, because the mean of its divisors is an integer number (4769856).

Almost surely, 2^66131562 is an apocalyptic number.

66131562 is an abundant number, since it is smaller than the sum of its proper divisors (86503830).

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

66131562 is a wasteful number, since it uses less digits than its factorization.

66131562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15402.

The product of its digits is 6480, while the sum is 30.

The square root of 66131562 is about 8132.1314549139. The cubic root of 66131562 is about 404.3923458690.

It can be divided in two parts, 661 and 31562, that added together give a palindrome (32223).

The spelling of 66131562 in words is "sixty-six million, one hundred thirty-one thousand, five hundred sixty-two".