66311375625105 has 16 divisors (see below), whose sum is σ = 114259601077440. Its totient is φ = 32645600307648.

The previous prime is 66311375625073. The next prime is 66311375625113. The reversal of 66311375625105 is 50152657311366.

It is not a de Polignac number, because 66311375625105 - 2⁵ = 66311375625073 is a prime.

It is a super-2 number, since 2×66311375625105² (a number of 28 digits) contains 22 as substring.

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, 170029168075 + ... + 170029168464.

It is an arithmetic number, because the mean of its divisors is an integer number (7141225067340).

Almost surely, 2^{66311375625105} is an apocalyptic number.

66311375625105 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66311375625105 is a deficient number, since it is larger than the sum of its proper divisors (47948225452335).

66311375625105 is a wasteful number, since it uses less digits than its factorization.

66311375625105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340058336560.

The product of its (nonzero) digits is 3402000, while the sum is 51.

The spelling of 66311375625105 in words is "sixty-six trillion, three hundred eleven billion, three hundred seventy-five million, six hundred twenty-five thousand, one hundred five".