1377666512890 has 8 divisors (see below), whose sum is σ = 2479799723220. Its totient is φ = 551066605152.

The previous prime is 1377666512857. The next prime is 1377666512927. The reversal of 1377666512890 is 982156667731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1315014921081 + 62651591809 = 1146741^2 + 250303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68883325635 + ... + 68883325654.

Almost surely, 2^{1377666512890} is an apocalyptic number.

1377666512890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1377666512890 is a deficient number, since it is larger than the sum of its proper divisors (1102133210330).

1377666512890 is a wasteful number, since it uses less digits than its factorization.

1377666512890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137766651296.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 1377666512890 in words is "one trillion, three hundred seventy-seven billion, six hundred sixty-six million, five hundred twelve thousand, eight hundred ninety".