66196034887 has 16 divisors (see below), whose sum is σ = 68581013760. Its totient is φ = 63863568000.

The previous prime is 66196034843. The next prime is 66196034899. The reversal of 66196034887 is 78843069166.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66196034887 - 2¹⁹ = 66195510599 is a prime.

It is a super-2 number, since 2×66196034887² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66196334887) 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, 694687 + ... + 784207.

It is an arithmetic number, because the mean of its divisors is an integer number (4286313360).

Almost surely, 2^66196034887 is an apocalyptic number.

66196034887 is a deficient number, since it is larger than the sum of its proper divisors (2384978873).

66196034887 is a wasteful number, since it uses less digits than its factorization.

66196034887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89814.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 66196034887 in words is "sixty-six billion, one hundred ninety-six million, thirty-four thousand, eight hundred eighty-seven".