65550066066 has 24 divisors (see below), whose sum is σ = 142509882060. Its totient is φ = 21775446816.

The previous prime is 65550066031. The next prime is 65550066137. The reversal of 65550066066 is 66066005556.

It can be written as a sum of positive squares in 2 ways, for example, as 60996650625 + 4553415441 = 246975^2 + 67479^2 .

It is a super-2 number, since 2×65550066066² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6209181 + ... + 6219728.

Almost surely, 2^65550066066 is an apocalyptic number.

65550066066 is an abundant number, since it is smaller than the sum of its proper divisors (76959815994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65550066066 is a wasteful number, since it uses less digits than its factorization.

65550066066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12429210 (or 12429207 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 65550066066 in words is "sixty-five billion, five hundred fifty million, sixty-six thousand, sixty-six".