66131260 has 48 divisors (see below), whose sum is σ = 150194016. Its totient is φ = 24314112.

The previous prime is 66131251. The next prime is 66131287. The reversal of 66131260 is 6213166.

It is a congruent number.

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, 89854 + ... + 90586.

It is an arithmetic number, because the mean of its divisors is an integer number (3129042).

Almost surely, 2^66131260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66131260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75097008).

66131260 is an abundant number, since it is smaller than the sum of its proper divisors (84062756).

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

66131260 is a wasteful number, since it uses less digits than its factorization.

66131260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 66131260 is about 8132.1128865751. The cubic root of 66131260 is about 404.3917302946.

The spelling of 66131260 in words is "sixty-six million, one hundred thirty-one thousand, two hundred sixty".