663257146 has 4 divisors (see below), whose sum is σ = 994885722. Its totient is φ = 331628572.

The previous prime is 663257137. The next prime is 663257171. The reversal of 663257146 is 641752366.

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

It can be written as a sum of positive squares in only one way, i.e., 660233025 + 3024121 = 25695^2 + 1739^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 663257099 and 663257108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165814285 + ... + 165814288.

Almost surely, 2^663257146 is an apocalyptic number.

663257146 is a deficient number, since it is larger than the sum of its proper divisors (331628576).

663257146 is a wasteful number, since it uses less digits than its factorization.

663257146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331628575.

The product of its digits is 181440, while the sum is 40.

The square root of 663257146 is about 25753.7792566450. The cubic root of 663257146 is about 872.0886733676.

The spelling of 663257146 in words is "six hundred sixty-three million, two hundred fifty-seven thousand, one hundred forty-six".