400220663 has 2 divisors, whose sum is σ = 400220664. Its totient is φ = 400220662.

The previous prime is 400220657. The next prime is 400220671. The reversal of 400220663 is 366022004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400220663 - 2⁶ = 400220599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400220603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200110331 + 200110332.

It is an arithmetic number, because the mean of its divisors is an integer number (200110332).

Almost surely, 2^400220663 is an apocalyptic number.

400220663 is a deficient number, since it is larger than the sum of its proper divisors (1).

400220663 is an equidigital number, since it uses as much as digits as its factorization.

400220663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 400220663 is about 20005.5158143948. The cubic root of 400220663 is about 736.9417630618.

Adding to 400220663 its reverse (366022004), we get a palindrome (766242667).

The spelling of 400220663 in words is "four hundred million, two hundred twenty thousand, six hundred sixty-three".