1376666650025 has 36 divisors (see below), whose sum is σ = 1803705668172. Its totient is φ = 1042172714880.

The previous prime is 1376666650019. The next prime is 1376666650031. The reversal of 1376666650025 is 5200566666731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1376666650019) and next prime (1376666650031).

It can be written as a sum of positive squares in 6 ways, for example, as 120196036249 + 1256470613776 = 346693^2 + 1120924^2 .

It is not a de Polignac number, because 1376666650025 - 2³² = 1372371682729 is a prime.

It is a super-2 number, since 2×1376666650025² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7827959 + ... + 8001891.

It is an arithmetic number, because the mean of its divisors is an integer number (50102935227).

Almost surely, 2^{1376666650025} is an apocalyptic number.

It is an amenable number.

1376666650025 is a deficient number, since it is larger than the sum of its proper divisors (427039018147).

1376666650025 is a wasteful number, since it uses less digits than its factorization.

1376666650025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174858 (or 174834 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 1376666650025 in words is "one trillion, three hundred seventy-six billion, six hundred sixty-six million, six hundred fifty thousand, twenty-five".