400070663 has 4 divisors (see below), whose sum is σ = 400579800. Its totient is φ = 399561528.

The previous prime is 400070651. The next prime is 400070683. The reversal of 400070663 is 366070004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400070663 - 2⁴ = 400070647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400070633) 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, 253388 + ... + 254961.

It is an arithmetic number, because the mean of its divisors is an integer number (100144950).

Almost surely, 2^400070663 is an apocalyptic number.

400070663 is a deficient number, since it is larger than the sum of its proper divisors (509137).

400070663 is an equidigital number, since it uses as much as digits as its factorization.

400070663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509136.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 400070663 is about 20001.7664969872. The cubic root of 400070663 is about 736.8496846264.

The spelling of 400070663 in words is "four hundred million, seventy thousand, six hundred sixty-three".