66137460 has 72 divisors (see below), whose sum is σ = 189588000. Its totient is φ = 17226816.

The previous prime is 66137459. The next prime is 66137479. The reversal of 66137460 is 6473166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132291 + ... + 132789.

Almost surely, 2^66137460 is an apocalyptic number.

66137460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66137460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94794000).

66137460 is an abundant number, since it is smaller than the sum of its proper divisors (123450540).

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

66137460 is a wasteful number, since it uses less digits than its factorization.

66137460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66137460 is about 8132.4940823833. The cubic root of 66137460 is about 404.4043675375.

The spelling of 66137460 in words is "sixty-six million, one hundred thirty-seven thousand, four hundred sixty".