1966320178560 has 160 divisors (see below), whose sum is σ = 7022084572800. Its totient is φ = 524352033792.

The previous prime is 1966320178513. The next prime is 1966320178591. The reversal of 1966320178560 is 658710236691.

1966320178560 is a `hidden beast` number, since 1 + 9 + 6 + 6 + 3 + 2 + 0 + 1 + 78 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×1966320178560² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1966320178497 and 1966320178506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18913440 + ... + 19017119.

It is an arithmetic number, because the mean of its divisors is an integer number (43888028580).

Almost surely, 2^{1966320178560} is an apocalyptic number.

1966320178560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966320178560 is an abundant number, since it is smaller than the sum of its proper divisors (5055764394240).

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

1966320178560 is an equidigital number, since it uses as much as digits as its factorization.

1966320178560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37930590 (or 37930569 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 1966320178560 in words is "one trillion, nine hundred sixty-six billion, three hundred twenty million, one hundred seventy-eight thousand, five hundred sixty".