1163660266541 has 4 divisors (see below), whose sum is σ = 1166360174784. Its totient is φ = 1160960358300.

The previous prime is 1163660266537. The next prime is 1163660266633. The reversal of 1163660266541 is 1456620663611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1163660266541 - 2² = 1163660266537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163660266511) 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, 1349953475 + ... + 1349954336.

It is an arithmetic number, because the mean of its divisors is an integer number (291590043696).

Almost surely, 2^{1163660266541} is an apocalyptic number.

It is an amenable number.

1163660266541 is a deficient number, since it is larger than the sum of its proper divisors (2699908243).

1163660266541 is an equidigital number, since it uses as much as digits as its factorization.

1163660266541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699908242.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 1163660266541 in words is "one trillion, one hundred sixty-three billion, six hundred sixty million, two hundred sixty-six thousand, five hundred forty-one".