400660266 has 16 divisors (see below), whose sum is σ = 801520704. Its totient is φ = 133520064.

The previous prime is 400660243. The next prime is 400660303. The reversal of 400660266 is 662066004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35035 + ... + 45041.

It is an arithmetic number, because the mean of its divisors is an integer number (50095044).

Almost surely, 2^400660266 is an apocalyptic number.

400660266 is an abundant number, since it is smaller than the sum of its proper divisors (400860438).

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

400660266 is a wasteful number, since it uses less digits than its factorization.

400660266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16685.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 400660266 is about 20016.4998438788. The cubic root of 400660266 is about 737.2114836591.

The spelling of 400660266 in words is "four hundred million, six hundred sixty thousand, two hundred sixty-six".