1377812668 has 24 divisors (see below), whose sum is σ = 2562062832. Its totient is φ = 646082304.

The previous prime is 1377812629. The next prime is 1377812669. The reversal of 1377812668 is 8662187731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377812669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16555 + ... + 55042.

It is an arithmetic number, because the mean of its divisors is an integer number (106752618).

Almost surely, 2^1377812668 is an apocalyptic number.

It is an amenable number.

1377812668 is a deficient number, since it is larger than the sum of its proper divisors (1184250164).

1377812668 is a wasteful number, since it uses less digits than its factorization.

1377812668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71901 (or 71899 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 1377812668 is about 37118.8990677256. The cubic root of 1377812668 is about 1112.7477491913.

The spelling of 1377812668 in words is "one billion, three hundred seventy-seven million, eight hundred twelve thousand, six hundred sixty-eight".