1377242166687 has 4 divisors (see below), whose sum is σ = 1836322888920. Its totient is φ = 918161444456.

The previous prime is 1377242166679. The next prime is 1377242166721. The reversal of 1377242166687 is 7866612427731.

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

It is a cyclic number.

It is not a de Polignac number, because 1377242166687 - 2³ = 1377242166679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377242166687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377242166647) 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, 229540361112 + ... + 229540361117.

It is an arithmetic number, because the mean of its divisors is an integer number (459080722230).

Almost surely, 2^{1377242166687} is an apocalyptic number.

1377242166687 is a deficient number, since it is larger than the sum of its proper divisors (459080722233).

1377242166687 is an equidigital number, since it uses as much as digits as its factorization.

1377242166687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459080722232.

The product of its digits is 28449792, while the sum is 60.

The spelling of 1377242166687 in words is "one trillion, three hundred seventy-seven billion, two hundred forty-two million, one hundred sixty-six thousand, six hundred eighty-seven".