66475555707 has 8 divisors (see below), whose sum is σ = 96691717440. Its totient is φ = 40288215560.

The previous prime is 66475555667. The next prime is 66475555709. The reversal of 66475555707 is 70755557466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66475555707 - 2¹⁰ = 66475554683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66475555709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1007205357 + ... + 1007205422.

It is an arithmetic number, because the mean of its divisors is an integer number (12086464680).

Almost surely, 2^66475555707 is an apocalyptic number.

66475555707 is a deficient number, since it is larger than the sum of its proper divisors (30216161733).

66475555707 is a wasteful number, since it uses less digits than its factorization.

66475555707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014410793.

The product of its (nonzero) digits is 30870000, while the sum is 57.

The spelling of 66475555707 in words is "sixty-six billion, four hundred seventy-five million, five hundred fifty-five thousand, seven hundred seven".