400666670 has 32 divisors (see below), whose sum is σ = 762117120. Its totient is φ = 151351200.

The previous prime is 400666667. The next prime is 400666691. The reversal of 400666670 is 76666004.

It is a self number, because there is not a number n which added to its sum of digits gives 400666670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7145 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (23816160).

Almost surely, 2^400666670 is an apocalyptic number.

400666670 is a deficient number, since it is larger than the sum of its proper divisors (361450450).

400666670 is a wasteful number, since it uses less digits than its factorization.

400666670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22160.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 400666670 is about 20016.6598112672. The cubic root of 400666670 is about 737.2154114067.

The spelling of 400666670 in words is "four hundred million, six hundred sixty-six thousand, six hundred seventy".