66780484 has 6 divisors (see below), whose sum is σ = 116865854. Its totient is φ = 33390240.

The previous prime is 66780481. The next prime is 66780487. The reversal of 66780484 is 48408766.

It is an interprime number because it is at equal distance from previous prime (66780481) and next prime (66780487).

It can be written as a sum of positive squares in only one way, i.e., 62252100 + 4528384 = 7890^2 + 2128^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66780484.

It is not an unprimeable number, because it can be changed into a prime (66780481) 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 as a sum of consecutive naturals, namely, 8347557 + ... + 8347564.

Almost surely, 2^66780484 is an apocalyptic number.

It is an amenable number.

66780484 is a deficient number, since it is larger than the sum of its proper divisors (50085370).

66780484 is a wasteful number, since it uses less digits than its factorization.

66780484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16695125 (or 16695123 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 66780484 is about 8171.9326967370. The cubic root of 66780484 is about 405.7107551813.

The spelling of 66780484 in words is "sixty-six million, seven hundred eighty thousand, four hundred eighty-four".