1966142448628 has 6 divisors (see below), whose sum is σ = 3440749285106. Its totient is φ = 983071224312.

The previous prime is 1966142448503. The next prime is 1966142448631. The reversal of 1966142448628 is 8268442416691.

It can be written as a sum of positive squares in only one way, i.e., 1136808028944 + 829334419684 = 1066212^2 + 910678^2 .

It is a super-2 number, since 2×1966142448628² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245767806075 + ... + 245767806082.

Almost surely, 2^{1966142448628} is an apocalyptic number.

It is an amenable number.

1966142448628 is a deficient number, since it is larger than the sum of its proper divisors (1474606836478).

1966142448628 is a wasteful number, since it uses less digits than its factorization.

1966142448628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491535612161 (or 491535612159 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 61.

The spelling of 1966142448628 in words is "one trillion, nine hundred sixty-six billion, one hundred forty-two million, four hundred forty-eight thousand, six hundred twenty-eight".