65066510881 has 8 divisors (see below), whose sum is σ = 67315432680. Its totient is φ = 62817939072.

The previous prime is 65066510843. The next prime is 65066510897. The reversal of 65066510881 is 18801566056.

It can be written as a sum of positive squares in 4 ways, for example, as 32646707856 + 32419803025 = 180684^2 + 180055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65066510881 - 2¹¹ = 65066508833 is a prime.

It is a super-2 number, since 2×65066510881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65066510381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323541 + ... + 484573.

It is an arithmetic number, because the mean of its divisors is an integer number (8414429085).

Almost surely, 2^65066510881 is an apocalyptic number.

It is an amenable number.

65066510881 is a deficient number, since it is larger than the sum of its proper divisors (2248921799).

65066510881 is a wasteful number, since it uses less digits than its factorization.

65066510881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174995.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 65066510881 in words is "sixty-five billion, sixty-six million, five hundred ten thousand, eight hundred eighty-one".