1663364657577 has 96 divisors (see below), whose sum is σ = 2620682007552. Its totient is φ = 919252800000.

The previous prime is 1663364657557. The next prime is 1663364657657. The reversal of 1663364657577 is 7757564633661.

It is a happy number.

It is not a de Polignac number, because 1663364657577 - 2²⁸ = 1663096222121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1663364657527) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3074610927 + ... + 3074611467.

It is an arithmetic number, because the mean of its divisors is an integer number (27298770912).

Almost surely, 2^{1663364657577} is an apocalyptic number.

It is an amenable number.

1663364657577 is a deficient number, since it is larger than the sum of its proper divisors (957317349975).

1663364657577 is a wasteful number, since it uses less digits than its factorization.

1663364657577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1190 counting only the distinct ones).

The product of its digits is 400075200, while the sum is 66.

The spelling of 1663364657577 in words is "one trillion, six hundred sixty-three billion, three hundred sixty-four million, six hundred fifty-seven thousand, five hundred seventy-seven".