66134656634605 has 32 divisors (see below), whose sum is σ = 85535252812800. Its totient is φ = 48798518729472.

The previous prime is 66134656634603. The next prime is 66134656634633. The reversal of 66134656634605 is 50643665643166.

It is a cyclic number.

It is not a de Polignac number, because 66134656634605 - 2¹ = 66134656634603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66134656634603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1968921151 + ... + 1968954739.

It is an arithmetic number, because the mean of its divisors is an integer number (2672976650400).

Almost surely, 2^{66134656634605} is an apocalyptic number.

66134656634605 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66134656634605 is a deficient number, since it is larger than the sum of its proper divisors (19400596178195).

66134656634605 is a wasteful number, since it uses less digits than its factorization.

66134656634605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57133.

The product of its (nonzero) digits is 167961600, while the sum is 61.

The spelling of 66134656634605 in words is "sixty-six trillion, one hundred thirty-four billion, six hundred fifty-six million, six hundred thirty-four thousand, six hundred five".