666065051099 has 16 divisors (see below), whose sum is σ = 804112692480. Its totient is φ = 538953639840.

The previous prime is 666065051053. The next prime is 666065051129. The reversal of 666065051099 is 990150560666.

666065051099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666065051099 - 2²⁴ = 666048273883 is a prime.

It is a super-2 number, since 2×666065051099² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666065051099.

It is not an unprimeable number, because it can be changed into a prime (666065054099) 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, 8810432 + ... + 8885709.

It is an arithmetic number, because the mean of its divisors is an integer number (50257043280).

Almost surely, 2^666065051099 is an apocalyptic number.

666065051099 is a deficient number, since it is larger than the sum of its proper divisors (138047641381).

666065051099 is a wasteful number, since it uses less digits than its factorization.

666065051099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17696450.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 666065051099 in words is "six hundred sixty-six billion, sixty-five million, fifty-one thousand, ninety-nine".