66193087 has 16 divisors (see below), whose sum is σ = 71710272. Its totient is φ = 60874240.

The previous prime is 66193069. The next prime is 66193097. The reversal of 66193087 is 78039166.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66193087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66193007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208653 + ... + 208969.

It is an arithmetic number, because the mean of its divisors is an integer number (4481892).

Almost surely, 2^66193087 is an apocalyptic number.

66193087 is a deficient number, since it is larger than the sum of its proper divisors (5517185).

66193087 is a wasteful number, since it uses less digits than its factorization.

66193087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 66193087 is about 8135.9134090771. The cubic root of 66193087 is about 404.5177147881.

The spelling of 66193087 in words is "sixty-six million, one hundred ninety-three thousand, eighty-seven".