511666868011 has 16 divisors (see below), whose sum is σ = 552668163264. Its totient is φ = 470901993984.

The previous prime is 511666867993. The next prime is 511666868039. The reversal of 511666868011 is 110868666115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 511666868011 - 2⁷ = 511666867883 is a prime.

It is a super-2 number, since 2×511666868011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511666868051) 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, 6908271 + ... + 6981943.

It is an arithmetic number, because the mean of its divisors is an integer number (34541760204).

Almost surely, 2^511666868011 is an apocalyptic number.

511666868011 is a deficient number, since it is larger than the sum of its proper divisors (41001295253).

511666868011 is a wasteful number, since it uses less digits than its factorization.

511666868011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75270.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 511666868011 in words is "five hundred eleven billion, six hundred sixty-six million, eight hundred sixty-eight thousand, eleven".