666747474068 has 24 divisors (see below), whose sum is σ = 1259031285960. Its totient is φ = 307125014400.

The previous prime is 666747474059. The next prime is 666747474077. The reversal of 666747474068 is 860474747666.

666747474068 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 (666747474059) and next prime (666747474077).

It can be written as a sum of positive squares in 4 ways, for example, as 276257462404 + 390490011664 = 525602^2 + 624892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666747473995 and 666747474013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12568883 + ... + 12621818.

It is an arithmetic number, because the mean of its divisors is an integer number (52459636915).

Almost surely, 2^666747474068 is an apocalyptic number.

It is an amenable number.

666747474068 is a deficient number, since it is larger than the sum of its proper divisors (592283811892).

666747474068 is a wasteful number, since it uses less digits than its factorization.

666747474068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25191227 (or 25191225 counting only the distinct ones).

The product of its (nonzero) digits is 227598336, while the sum is 65.

The spelling of 666747474068 in words is "six hundred sixty-six billion, seven hundred forty-seven million, four hundred seventy-four thousand, sixty-eight".