66605060507 has 4 divisors (see below), whose sum is σ = 67227537816. Its totient is φ = 65982583200.

The previous prime is 66605060503. The next prime is 66605060513. The reversal of 66605060507 is 70506050666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66605060507 - 2² = 66605060503 is a prime.

It is a super-2 number, since 2×66605060507² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66605060503) 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 3 ways as a sum of consecutive naturals, for example, 311238494 + ... + 311238707.

It is an arithmetic number, because the mean of its divisors is an integer number (16806884454).

Almost surely, 2^66605060507 is an apocalyptic number.

66605060507 is a deficient number, since it is larger than the sum of its proper divisors (622477309).

66605060507 is a wasteful number, since it uses less digits than its factorization.

66605060507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622477308.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 66605060507 in words is "sixty-six billion, six hundred five million, sixty thousand, five hundred seven".