66641521466 has 32 divisors (see below), whose sum is σ = 114129570240. Its totient is φ = 28911419136.

The previous prime is 66641521447. The next prime is 66641521487. The reversal of 66641521466 is 66412514666.

66641521466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66641521466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252065 + ... + 443643.

It is an arithmetic number, because the mean of its divisors is an integer number (3566549070).

Almost surely, 2^66641521466 is an apocalyptic number.

66641521466 is a deficient number, since it is larger than the sum of its proper divisors (47488048774).

66641521466 is a wasteful number, since it uses less digits than its factorization.

66641521466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192398.

The product of its digits is 1244160, while the sum is 47.

The spelling of 66641521466 in words is "sixty-six billion, six hundred forty-one million, five hundred twenty-one thousand, four hundred sixty-six".