66146276 has 36 divisors (see below), whose sum is σ = 135246636. Its totient is φ = 28224000.

The previous prime is 66146209. The next prime is 66146287. The reversal of 66146276 is 67264166.

It can be written as a sum of positive squares in 2 ways, for example, as 15366400 + 50779876 = 3920^2 + 7126^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54476 + ... + 55676.

It is an arithmetic number, because the mean of its divisors is an integer number (3756851).

Almost surely, 2^66146276 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 66146276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67623318).

66146276 is an abundant number, since it is smaller than the sum of its proper divisors (69100360).

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

66146276 is a wasteful number, since it uses less digits than its factorization.

66146276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500 (or 1491 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 66146276 is about 8133.0360874645. The cubic root of 66146276 is about 404.4223355217.

The spelling of 66146276 in words is "sixty-six million, one hundred forty-six thousand, two hundred seventy-six".