66089694 has 32 divisors (see below), whose sum is σ = 144587520. Its totient is φ = 19972800.

The previous prime is 66089669. The next prime is 66089701. The reversal of 66089694 is 49698066.

It is a congruent number.

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, 27834 + ... + 30114.

It is an arithmetic number, because the mean of its divisors is an integer number (4518360).

Almost surely, 2^66089694 is an apocalyptic number.

66089694 is an abundant number, since it is smaller than the sum of its proper divisors (78497826).

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

66089694 is a wasteful number, since it uses less digits than its factorization.

66089694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 66089694 is about 8129.5568144887. The cubic root of 66089694 is about 404.3069873678.

The spelling of 66089694 in words is "sixty-six million, eighty-nine thousand, six hundred ninety-four".