666111106051 has 16 divisors (see below), whose sum is σ = 701904752640. Its totient is φ = 630888302880.

The previous prime is 666111106049. The next prime is 666111106061. The reversal of 666111106051 is 150601111666.

It is a cyclic number.

It is not a de Polignac number, because 666111106051 - 2¹ = 666111106049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666111105998 and 666111106016.

It is not an unprimeable number, because it can be changed into a prime (666111106021) 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, 36452145 + ... + 36470413.

It is an arithmetic number, because the mean of its divisors is an integer number (43869047040).

Almost surely, 2^666111106051 is an apocalyptic number.

666111106051 is a deficient number, since it is larger than the sum of its proper divisors (35793646589).

666111106051 is a wasteful number, since it uses less digits than its factorization.

666111106051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33786.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 666111106051 in words is "six hundred sixty-six billion, one hundred eleven million, one hundred six thousand, fifty-one".