1966429171804 has 24 divisors (see below), whose sum is σ = 3582589530240. Its totient is φ = 943264061376.

The previous prime is 1966429171783. The next prime is 1966429171829. The reversal of 1966429171804 is 4081719246691.

It is a happy number.

It is a super-2 number, since 2×1966429171804² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

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, 53968972 + ... + 54005395.

It is an arithmetic number, because the mean of its divisors is an integer number (149274563760).

Almost surely, 2^{1966429171804} is an apocalyptic number.

It is an amenable number.

1966429171804 is a deficient number, since it is larger than the sum of its proper divisors (1616160358436).

1966429171804 is a wasteful number, since it uses less digits than its factorization.

1966429171804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107974557 (or 107974555 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 1966429171804 in words is "one trillion, nine hundred sixty-six billion, four hundred twenty-nine million, one hundred seventy-one thousand, eight hundred four".