6660350506 has 4 divisors (see below), whose sum is σ = 9990525762. Its totient is φ = 3330175252.

The previous prime is 6660350503. The next prime is 6660350507. The reversal of 6660350506 is 6050530666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6050530666 = 2 ⋅3025265333.

It can be written as a sum of positive squares in only one way, i.e., 4154447025 + 2505903481 = 64455^2 + 50059^2 .

It is not an unprimeable number, because it can be changed into a prime (6660350503) 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, 1665087625 + ... + 1665087628.

Almost surely, 2^6660350506 is an apocalyptic number.

6660350506 is a deficient number, since it is larger than the sum of its proper divisors (3330175256).

6660350506 is a wasteful number, since it uses less digits than its factorization.

6660350506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330175255.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 6660350506 is about 81610.9705002949. The cubic root of 6660350506 is about 1881.4774964801.

The spelling of 6660350506 in words is "six billion, six hundred sixty million, three hundred fifty thousand, five hundred six".