1966865703770 has 16 divisors (see below), whose sum is σ = 3862209018528. Its totient is φ = 715223892240.

The previous prime is 1966865703767. The next prime is 1966865703779. The reversal of 1966865703770 is 773075686691.

It is a junction number, because it is equal to n+sod(n) for n = 1966865703697 and 1966865703706.

It is not an unprimeable number, because it can be changed into a prime (1966865703779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8940298544 + ... + 8940298763.

It is an arithmetic number, because the mean of its divisors is an integer number (241388063658).

Almost surely, 2^{1966865703770} is an apocalyptic number.

1966865703770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1966865703770 is a deficient number, since it is larger than the sum of its proper divisors (1895343314758).

1966865703770 is a wasteful number, since it uses less digits than its factorization.

1966865703770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17880597325.

The product of its (nonzero) digits is 80015040, while the sum is 65.

The spelling of 1966865703770 in words is "one trillion, nine hundred sixty-six billion, eight hundred sixty-five million, seven hundred three thousand, seven hundred seventy".