457240021866 has 12 divisors (see below), whose sum is σ = 990686714082. Its totient is φ = 152413340616.

The previous prime is 457240021859. The next prime is 457240021867. The reversal of 457240021866 is 668120042754.

457240021866 is a `hidden beast` number, since 4 + 572 + 4 + 0 + 0 + 2 + 18 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 432410141241 + 24829880625 = 657579^2 + 157575^2 .

It is not an unprimeable number, because it can be changed into a prime (457240021867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12701111701 + ... + 12701111736.

Almost surely, 2^457240021866 is an apocalyptic number.

457240021866 is an abundant number, since it is smaller than the sum of its proper divisors (533446692216).

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

457240021866 is a wasteful number, since it uses less digits than its factorization.

457240021866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25402223445 (or 25402223442 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 457240021866 in words is "four hundred fifty-seven billion, two hundred forty million, twenty-one thousand, eight hundred sixty-six".