66110061657670 has 16 divisors (see below), whose sum is σ = 118998330273648. Its totient is φ = 26443975932000.

The previous prime is 66110061657649. The next prime is 66110061657671. The reversal of 66110061657670 is 7675616001166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66110061657671) 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, 114249 + ... + 11499268.

It is an arithmetic number, because the mean of its divisors is an integer number (7437395642103).

Almost surely, 2^{66110061657670} is an apocalyptic number.

66110061657670 is a deficient number, since it is larger than the sum of its proper divisors (52888268615978).

66110061657670 is a wasteful number, since it uses less digits than its factorization.

66110061657670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12182775.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 66110061657670 in words is "sixty-six trillion, one hundred ten billion, sixty-one million, six hundred fifty-seven thousand, six hundred seventy".