66501460 has 24 divisors (see below), whose sum is σ = 140161896. Its totient is φ = 26503680.

The previous prime is 66501451. The next prime is 66501473. The reversal of 66501460 is 6410566.

It can be written as a sum of positive squares in 4 ways, for example, as 26584336 + 39917124 = 5156^2 + 6318^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 297 + ... + 11536.

It is an arithmetic number, because the mean of its divisors is an integer number (5840079).

Almost surely, 2^66501460 is an apocalyptic number.

It is an amenable number.

66501460 is an abundant number, since it is smaller than the sum of its proper divisors (73660436).

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

66501460 is a wasteful number, since it uses less digits than its factorization.

66501460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12123 (or 12121 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66501460 is about 8154.8427330023. The cubic root of 66501460 is about 405.1449158791.

The spelling of 66501460 in words is "sixty-six million, five hundred one thousand, four hundred sixty".