663145386 has 16 divisors (see below), whose sum is σ = 1327589568. Its totient is φ = 220832000.

The previous prime is 663145369. The next prime is 663145387. The reversal of 663145386 is 683541366.

It is not an unprimeable number, because it can be changed into a prime (663145387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47415 + ... + 59786.

It is an arithmetic number, because the mean of its divisors is an integer number (82974348).

Almost surely, 2^663145386 is an apocalyptic number.

663145386 is an abundant number, since it is smaller than the sum of its proper divisors (664444182).

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

663145386 is a wasteful number, since it uses less digits than its factorization.

663145386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108237.

The product of its digits is 311040, while the sum is 42.

The square root of 663145386 is about 25751.6093865995. The cubic root of 663145386 is about 872.0396877891.

The spelling of 663145386 in words is "six hundred sixty-three million, one hundred forty-five thousand, three hundred eighty-six".