66476625405 has 16 divisors (see below), whose sum is σ = 106599499200. Its totient is φ = 35375234048.

The previous prime is 66476625379. The next prime is 66476625437. The reversal of 66476625405 is 50452667466.

It is a cyclic number.

It is not a de Polignac number, because 66476625405 - 2²⁵ = 66443070973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4928427 + ... + 4941896.

It is an arithmetic number, because the mean of its divisors is an integer number (6662468700).

Almost surely, 2^66476625405 is an apocalyptic number.

It is an amenable number.

66476625405 is a deficient number, since it is larger than the sum of its proper divisors (40122873795).

66476625405 is a wasteful number, since it uses less digits than its factorization.

66476625405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870780.

The product of its (nonzero) digits is 7257600, while the sum is 51.

The spelling of 66476625405 in words is "sixty-six billion, four hundred seventy-six million, six hundred twenty-five thousand, four hundred five".