455221666 has 16 divisors (see below), whose sum is σ = 686659680. Its totient is φ = 226339360.

The previous prime is 455221643. The next prime is 455221667. The reversal of 455221666 is 666122554.

It is not an unprimeable number, because it can be changed into a prime (455221667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360945 + ... + 362203.

It is an arithmetic number, because the mean of its divisors is an integer number (42916230).

Almost surely, 2^455221666 is an apocalyptic number.

455221666 is a deficient number, since it is larger than the sum of its proper divisors (231438014).

455221666 is a wasteful number, since it uses less digits than its factorization.

455221666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129.

The product of its digits is 86400, while the sum is 37.

The square root of 455221666 is about 21335.9243062024. The cubic root of 455221666 is about 769.2620500618.

The spelling of 455221666 in words is "four hundred fifty-five million, two hundred twenty-one thousand, six hundred sixty-six".