1966197232650 has 96 divisors (see below), whose sum is σ = 5575541856768. Its totient is φ = 449192548800.

The previous prime is 1966197232609. The next prime is 1966197232697. The reversal of 1966197232650 is 562327916691.

It is a super-7 number, since 7×1966197232650⁷ (a number of 87 digits) contains 7777777 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1645969 + ... + 2577131.

It is an arithmetic number, because the mean of its divisors is an integer number (58078561008).

Almost surely, 2^{1966197232650} is an apocalyptic number.

1966197232650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966197232650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2787770928384).

1966197232650 is an abundant number, since it is smaller than the sum of its proper divisors (3609344624118).

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

1966197232650 is a wasteful number, since it uses less digits than its factorization.

1966197232650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933196 (or 933191 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 57.

The spelling of 1966197232650 in words is "one trillion, nine hundred sixty-six billion, one hundred ninety-seven million, two hundred thirty-two thousand, six hundred fifty".