1277783831066 has 32 divisors (see below), whose sum is σ = 2003405488128. Its totient is φ = 610077227760.

The previous prime is 1277783831063. The next prime is 1277783831099. The reversal of 1277783831066 is 6601383877721.

It is a junction number, because it is equal to n+sod(n) for n = 1277783830996 and 1277783831014.

It is not an unprimeable number, because it can be changed into a prime (1277783831063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 72153785 + ... + 72171491.

It is an arithmetic number, because the mean of its divisors is an integer number (62606421504).

Almost surely, 2^{1277783831066} is an apocalyptic number.

1277783831066 is a deficient number, since it is larger than the sum of its proper divisors (725621657062).

1277783831066 is a wasteful number, since it uses less digits than its factorization.

1277783831066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20306.

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 1277783831066 in words is "one trillion, two hundred seventy-seven billion, seven hundred eighty-three million, eight hundred thirty-one thousand, sixty-six".