1966702212678 has 16 divisors (see below), whose sum is σ = 4495319343360. Its totient is φ = 561914917896.

The previous prime is 1966702212583. The next prime is 1966702212703. The reversal of 1966702212678 is 8762122076691.

It is a happy number.

It is a super-2 number, since 2×1966702212678² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23413121538 + ... + 23413121621.

It is an arithmetic number, because the mean of its divisors is an integer number (280957458960).

Almost surely, 2^{1966702212678} is an apocalyptic number.

1966702212678 is an abundant number, since it is smaller than the sum of its proper divisors (2528617130682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1966702212678 is a wasteful number, since it uses less digits than its factorization.

1966702212678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46826243171.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 1966702212678 in words is "one trillion, nine hundred sixty-six billion, seven hundred two million, two hundred twelve thousand, six hundred seventy-eight".