663261461275 has 48 divisors (see below), whose sum is σ = 996460418880. Its totient is φ = 427523788800.

The previous prime is 663261461263. The next prime is 663261461281. The reversal of 663261461275 is 572164162366.

It is not a de Polignac number, because 663261461275 - 2¹⁵ = 663261428507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2268985 + ... + 2544565.

It is an arithmetic number, because the mean of its divisors is an integer number (20759592060).

Almost surely, 2^663261461275 is an apocalyptic number.

663261461275 is a deficient number, since it is larger than the sum of its proper divisors (333198957605).

663261461275 is a wasteful number, since it uses less digits than its factorization.

663261461275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276424 (or 276419 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The spelling of 663261461275 in words is "six hundred sixty-three billion, two hundred sixty-one million, four hundred sixty-one thousand, two hundred seventy-five".