66187060 has 12 divisors (see below), whose sum is σ = 138992868. Its totient is φ = 26474816.

The previous prime is 66187027. The next prime is 66187063. The reversal of 66187060 is 6078166.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 54937744 = 3354^2 + 7412^2 .

It is a super-2 number, since 2×66187060² = 8761453822887200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66187063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654657 + ... + 1654696.

It is an arithmetic number, because the mean of its divisors is an integer number (11582739).

Almost surely, 2^66187060 is an apocalyptic number.

It is an amenable number.

66187060 is an abundant number, since it is smaller than the sum of its proper divisors (72805808).

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

66187060 is a wasteful number, since it uses less digits than its factorization.

66187060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309362 (or 3309360 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 66187060 is about 8135.5430058479. The cubic root of 66187060 is about 404.5054370595.

The spelling of 66187060 in words is "sixty-six million, one hundred eighty-seven thousand, sixty".