66550760 has 32 divisors (see below), whose sum is σ = 150213960. Its totient is φ = 26535936.

The previous prime is 66550741. The next prime is 66550763. The reversal of 66550760 is 6705566.

It can be written as a sum of positive squares in 4 ways, for example, as 44328964 + 22221796 = 6658^2 + 4714^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66550760.

It is not an unprimeable number, because it can be changed into a prime (66550763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11012 + ... + 15948.

Almost surely, 2^66550760 is an apocalyptic number.

It is an amenable number.

66550760 is an abundant number, since it is smaller than the sum of its proper divisors (83663200).

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

66550760 is a wasteful number, since it uses less digits than its factorization.

66550760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285 (or 5281 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 66550760 is about 8157.8649167536. The cubic root of 66550760 is about 405.2450074693.

The spelling of 66550760 in words is "sixty-six million, five hundred fifty thousand, seven hundred sixty".