666648846666 has 24 divisors (see below), whose sum is σ = 1575715456224. Its totient is φ = 202014801960.

The previous prime is 666648846653. The next prime is 666648846679.

666648846666 is nontrivially palindromic in base 10.

666648846666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (666648846653) and next prime (666648846679).

It is a super-2 number, since 2×666648846666² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666648846594 and 666648846603.

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, 1683456486 + ... + 1683456881.

It is an arithmetic number, because the mean of its divisors is an integer number (65654810676).

Almost surely, 2^666648846666 is an apocalyptic number.

666648846666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

666648846666 is an abundant number, since it is smaller than the sum of its proper divisors (909066609558).

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

666648846666 is a wasteful number, since it uses less digits than its factorization.

666648846666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366913386 (or 3366913383 counting only the distinct ones).

The product of its digits is 1719926784, while the sum is 72.

The spelling of 666648846666 in words is "six hundred sixty-six billion, six hundred forty-eight million, eight hundred forty-six thousand, six hundred sixty-six".