66787460 has 12 divisors (see below), whose sum is σ = 140253708. Its totient is φ = 26714976.

The previous prime is 66787459. The next prime is 66787463. The reversal of 66787460 is 6478766.

66787460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52301824 + 14485636 = 7232^2 + 3806^2 .

It is not an unprimeable number, because it can be changed into a prime (66787463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1669667 + ... + 1669706.

It is an arithmetic number, because the mean of its divisors is an integer number (11687809).

Almost surely, 2^66787460 is an apocalyptic number.

It is an amenable number.

66787460 is an abundant number, since it is smaller than the sum of its proper divisors (73466248).

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

66787460 is a wasteful number, since it uses less digits than its factorization.

66787460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339382 (or 3339380 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 66787460 is about 8172.3595124052. The cubic root of 66787460 is about 405.7248817620.

The spelling of 66787460 in words is "sixty-six million, seven hundred eighty-seven thousand, four hundred sixty".