161248662636766 has 4 divisors (see below), whose sum is σ = 241872993955152. Its totient is φ = 80624331318382.

The previous prime is 161248662636751. The next prime is 161248662636769. The reversal of 161248662636766 is 667636266842161.

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

It is a super-2 number, since 2×161248662636766² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161248662636695 and 161248662636704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161248662636769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40312165659190 + ... + 40312165659193.

It is an arithmetic number, because the mean of its divisors is an integer number (60468248488788).

Almost surely, 2^{161248662636766} is an apocalyptic number.

161248662636766 is a deficient number, since it is larger than the sum of its proper divisors (80624331318386).

161248662636766 is an equidigital number, since it uses as much as digits as its factorization.

161248662636766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80624331318385.

The product of its digits is 752467968, while the sum is 70.

The spelling of 161248662636766 in words is "one hundred sixty-one trillion, two hundred forty-eight billion, six hundred sixty-two million, six hundred thirty-six thousand, seven hundred sixty-six".