1663355257011 has 48 divisors (see below), whose sum is σ = 2908204947648. Its totient is φ = 894322944000.

The previous prime is 1663355257007. The next prime is 1663355257027. The reversal of 1663355257011 is 1107525533661.

1663355257011 is a `hidden beast` number, since 1 + 6 + 6 + 33 + 552 + 57 + 0 + 11 = 666.

It is not a de Polignac number, because 1663355257011 - 2² = 1663355257007 is a prime.

It is a super-2 number, since 2×1663355257011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1663355257211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3573111 + ... + 4011711.

It is an arithmetic number, because the mean of its divisors is an integer number (60587603076).

Almost surely, 2^{1663355257011} is an apocalyptic number.

1663355257011 is a deficient number, since it is larger than the sum of its proper divisors (1244849690637).

1663355257011 is a wasteful number, since it uses less digits than its factorization.

1663355257011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442172 (or 442169 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 1663355257011 in words is "one trillion, six hundred sixty-three billion, three hundred fifty-five million, two hundred fifty-seven thousand, eleven".