66131082208 has 48 divisors (see below), whose sum is σ = 131489205120. Its totient is φ = 32737632256.

The previous prime is 66131082113. The next prime is 66131082211. The reversal of 66131082208 is 80228013166.

It is a happy number.

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, 3523473 + ... + 3542191.

It is an arithmetic number, because the mean of its divisors is an integer number (2739358440).

Almost surely, 2^66131082208 is an apocalyptic number.

It is an amenable number.

66131082208 is a deficient number, since it is larger than the sum of its proper divisors (65358122912).

66131082208 is a wasteful number, since it uses less digits than its factorization.

66131082208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19819 (or 19811 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 66131082208 in words is "sixty-six billion, one hundred thirty-one million, eighty-two thousand, two hundred eight".