663146446631 has 2 divisors, whose sum is σ = 663146446632. Its totient is φ = 663146446630.

The previous prime is 663146446553. The next prime is 663146446639. The reversal of 663146446631 is 136644641366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663146446631 - 2³⁴ = 645966577447 is a prime.

It is a super-2 number, since 2×663146446631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 663146446631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663146446639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331573223315 + 331573223316.

It is an arithmetic number, because the mean of its divisors is an integer number (331573223316).

Almost surely, 2^663146446631 is an apocalyptic number.

663146446631 is a deficient number, since it is larger than the sum of its proper divisors (1).

663146446631 is an equidigital number, since it uses as much as digits as its factorization.

663146446631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 50.

The spelling of 663146446631 in words is "six hundred sixty-three billion, one hundred forty-six million, four hundred forty-six thousand, six hundred thirty-one".