440542666 has 8 divisors (see below), whose sum is σ = 660926340. Its totient is φ = 220233888.

The previous prime is 440542657. The next prime is 440542673. The reversal of 440542666 is 666245044.

It can be written as a sum of positive squares in 2 ways, for example, as 407192041 + 33350625 = 20179^2 + 5775^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 29686.

Almost surely, 2^440542666 is an apocalyptic number.

440542666 is a deficient number, since it is larger than the sum of its proper divisors (220383674).

440542666 is a wasteful number, since it uses less digits than its factorization.

440542666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37448.

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 440542666 is about 20989.1082707198. The cubic root of 440542666 is about 760.9030505096.

The spelling of 440542666 in words is "four hundred forty million, five hundred forty-two thousand, six hundred sixty-six".