218660845466 has 48 divisors (see below), whose sum is σ = 398605863240. Its totient is φ = 89584387200.

The previous prime is 218660845439. The next prime is 218660845471. The reversal of 218660845466 is 664548066812.

It can be written as a sum of positive squares in 4 ways, for example, as 216592506025 + 2068339441 = 465395^2 + 45479^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93845 + ... + 667928.

Almost surely, 2^218660845466 is an apocalyptic number.

218660845466 is a deficient number, since it is larger than the sum of its proper divisors (179945017774).

218660845466 is a wasteful number, since it uses less digits than its factorization.

218660845466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761919 (or 761912 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 56.

The spelling of 218660845466 in words is "two hundred eighteen billion, six hundred sixty million, eight hundred forty-five thousand, four hundred sixty-six".