164719892066 has 4 divisors (see below), whose sum is σ = 247079838102. Its totient is φ = 82359946032.

The previous prime is 164719892047. The next prime is 164719892069. The reversal of 164719892066 is 660298917461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660298917461 = 505727 ⋅1305643.

It can be written as a sum of positive squares in only one way, i.e., 142371137041 + 22348755025 = 377321^2 + 149495^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164719891996 and 164719892014.

It is not an unprimeable number, because it can be changed into a prime (164719892069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41179973015 + ... + 41179973018.

Almost surely, 2^164719892066 is an apocalyptic number.

164719892066 is a deficient number, since it is larger than the sum of its proper divisors (82359946036).

164719892066 is an equidigital number, since it uses as much as digits as its factorization.

164719892066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82359946035.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 164719892066 in words is "one hundred sixty-four billion, seven hundred nineteen million, eight hundred ninety-two thousand, sixty-six".