1361376666 has 32 divisors (see below), whose sum is σ = 3257997120. Its totient is φ = 418884912.

The previous prime is 1361376661. The next prime is 1361376721. The reversal of 1361376666 is 6666731631.

It is not an unprimeable number, because it can be changed into a prime (1361376661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 968940 + ... + 970343.

It is an arithmetic number, because the mean of its divisors is an integer number (101812410).

Almost surely, 2^1361376666 is an apocalyptic number.

1361376666 is an abundant number, since it is smaller than the sum of its proper divisors (1896620454).

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

1361376666 is a wasteful number, since it uses less digits than its factorization.

1361376666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939307 (or 1939301 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 1361376666 is about 36896.8381572188. The cubic root of 1361376666 is about 1108.3053615167.

The spelling of 1361376666 in words is "one billion, three hundred sixty-one million, three hundred seventy-six thousand, six hundred sixty-six".