66661134 has 16 divisors (see below), whose sum is σ = 136159488. Its totient is φ = 21747512.

The previous prime is 66661109. The next prime is 66661151. The reversal of 66661134 is 43116666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66661095 and 66661104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117912 + ... + 118475.

It is an arithmetic number, because the mean of its divisors is an integer number (8509968).

Almost surely, 2^66661134 is an apocalyptic number.

66661134 is an abundant number, since it is smaller than the sum of its proper divisors (69498354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66661134 is a wasteful number, since it uses less digits than its factorization.

66661134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236439.

The product of its digits is 15552, while the sum is 33.

The square root of 66661134 is about 8164.6269969914. The cubic root of 66661134 is about 405.4689157958.

It can be divided in two parts, 66661 and 134, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 66661134 in words is "sixty-six million, six hundred sixty-one thousand, one hundred thirty-four".