663260362006441 has 4 divisors (see below), whose sum is σ = 666627165874692. Its totient is φ = 659893558138192.

The previous prime is 663260362006433. The next prime is 663260362006447. The reversal of 663260362006441 is 144600263062366.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 471333695868841 + 191926666137600 = 21710221^2 + 13853760^2 .

It is a cyclic number.

It is not a de Polignac number, because 663260362006441 - 2³ = 663260362006433 is a prime.

It is a super-3 number, since 3×663260362006441³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663260362006447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683401933830 + ... + 1683401934223.

It is an arithmetic number, because the mean of its divisors is an integer number (166656791468673).

Almost surely, 2^{663260362006441} is an apocalyptic number.

It is an amenable number.

663260362006441 is a deficient number, since it is larger than the sum of its proper divisors (3366803868251).

663260362006441 is a wasteful number, since it uses less digits than its factorization.

663260362006441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366803868250.

The product of its (nonzero) digits is 4478976, while the sum is 49.

The spelling of 663260362006441 in words is "six hundred sixty-three trillion, two hundred sixty billion, three hundred sixty-two million, six thousand, four hundred forty-one".