66008632081 has 16 divisors (see below), whose sum is σ = 77292952704. Its totient is φ = 55191354624.

The previous prime is 66008632073. The next prime is 66008632091. The reversal of 66008632081 is 18023680066.

It is not a de Polignac number, because 66008632081 - 2³ = 66008632073 is a prime.

It is a super-2 number, since 2×66008632081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66008632031) 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, 90825 + ... + 374521.

It is an arithmetic number, because the mean of its divisors is an integer number (4830809544).

Almost surely, 2^66008632081 is an apocalyptic number.

It is an amenable number.

66008632081 is a deficient number, since it is larger than the sum of its proper divisors (11284320623).

66008632081 is a wasteful number, since it uses less digits than its factorization.

66008632081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284520.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 66008632081 in words is "sixty-six billion, eight million, six hundred thirty-two thousand, eighty-one".