6371780066 has 8 divisors (see below), whose sum is σ = 9887245020. Its totient is φ = 3076031728.

The previous prime is 6371780057. The next prime is 6371780099. The reversal of 6371780066 is 6600871736.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5697079441 + 674700625 = 75479^2 + 25975^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6371779999 and 6371780026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54929081 + ... + 54929196.

Almost surely, 2^6371780066 is an apocalyptic number.

6371780066 is a deficient number, since it is larger than the sum of its proper divisors (3515464954).

6371780066 is a wasteful number, since it uses less digits than its factorization.

6371780066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109858308.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 6371780066 is about 79823.4305577003. The cubic root of 6371780066 is about 1853.9026516902.

The spelling of 6371780066 in words is "six billion, three hundred seventy-one million, seven hundred eighty thousand, sixty-six".