400822666 has 8 divisors (see below), whose sum is σ = 601679844. Its totient is φ = 200262720.

The previous prime is 400822637. The next prime is 400822699. The reversal of 400822666 is 666228004.

It can be written as a sum of positive squares in 2 ways, for example, as 338744025 + 62078641 = 18405^2 + 7879^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70905 + ... + 76348.

Almost surely, 2^400822666 is an apocalyptic number.

400822666 is a deficient number, since it is larger than the sum of its proper divisors (200857178).

400822666 is a wasteful number, since it uses less digits than its factorization.

400822666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148616.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 400822666 is about 20020.5560861830. The cubic root of 400822666 is about 737.3110750776.

The spelling of 400822666 in words is "four hundred million, eight hundred twenty-two thousand, six hundred sixty-six".