442495666 has 8 divisors (see below), whose sum is σ = 692601984. Its totient is φ = 211628340.

The previous prime is 442495663. The next prime is 442495679. The reversal of 442495666 is 666594244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 9619471 = 442495666 / (4 + 4 + 2 + 4 + 9 + 5 + 6 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (442495663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4809690 + ... + 4809781.

It is an arithmetic number, because the mean of its divisors is an integer number (86575248).

Almost surely, 2^442495666 is an apocalyptic number.

442495666 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

442495666 is a deficient number, since it is larger than the sum of its proper divisors (250106318).

442495666 is a wasteful number, since it uses less digits than its factorization.

442495666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9619496.

The product of its digits is 1244160, while the sum is 46.

The square root of 442495666 is about 21035.5809522818. The cubic root of 442495666 is about 762.0257969190.

The spelling of 442495666 in words is "four hundred forty-two million, four hundred ninety-five thousand, six hundred sixty-six".