256666619214 has 20 divisors (see below), whose sum is σ = 575123350824. Its totient is φ = 85555539684.

The previous prime is 256666619203. The next prime is 256666619329. The reversal of 256666619214 is 412916666652.

It is a super-5 number, since 5×256666619214⁵ (a number of 58 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 792180762 + ... + 792181085.

Almost surely, 2^256666619214 is an apocalyptic number.

256666619214 is an abundant number, since it is smaller than the sum of its proper divisors (318456731610).

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

256666619214 is a wasteful number, since it uses less digits than its factorization.

256666619214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584361861 (or 1584361852 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 256666619214 in words is "two hundred fifty-six billion, six hundred sixty-six million, six hundred nineteen thousand, two hundred fourteen".