1376666684 has 24 divisors (see below), whose sum is σ = 2428234368. Its totient is φ = 682905600.

The previous prime is 1376666657. The next prime is 1376666699. The reversal of 1376666684 is 4866666731.

It is a happy number.

It is a super-2 number, since 2×1376666684² = 3790422317671111712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307349 + ... + 311795.

It is an arithmetic number, because the mean of its divisors is an integer number (101176432).

Almost surely, 2^1376666684 is an apocalyptic number.

It is an amenable number.

1376666684 is a deficient number, since it is larger than the sum of its proper divisors (1051567684).

1376666684 is a wasteful number, since it uses less digits than its factorization.

1376666684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045 (or 5043 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 53.

The square root of 1376666684 is about 37103.4591918328. The cubic root of 1376666684 is about 1112.4391574519.

The spelling of 1376666684 in words is "one billion, three hundred seventy-six million, six hundred sixty-six thousand, six hundred eighty-four".