13765377666 has 128 divisors (see below), whose sum is σ = 30581591040. Its totient is φ = 4113027072.

The previous prime is 13765377643. The next prime is 13765377667. The reversal of 13765377666 is 66677356731.

It is a super-2 number, since 2×13765377666² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13765377667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40846650 + ... + 40846986.

It is an arithmetic number, because the mean of its divisors is an integer number (238918680).

Almost surely, 2^13765377666 is an apocalyptic number.

13765377666 is an abundant number, since it is smaller than the sum of its proper divisors (16816213374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13765377666 is a wasteful number, since it uses less digits than its factorization.

13765377666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608.

The product of its digits is 20003760, while the sum is 57.

The spelling of 13765377666 in words is "thirteen billion, seven hundred sixty-five million, three hundred seventy-seven thousand, six hundred sixty-six".