1618389722066 has 32 divisors (see below), whose sum is σ = 2642458828800. Its totient is φ = 738943684416.

The previous prime is 1618389722057. The next prime is 1618389722069. The reversal of 1618389722066 is 6602279838161.

It is a junction number, because it is equal to n+sod(n) for n = 1618389721996 and 1618389722014.

It is not an unprimeable number, because it can be changed into a prime (1618389722069) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 450215 + ... + 1854581.

It is an arithmetic number, because the mean of its divisors is an integer number (82576838400).

Almost surely, 2^{1618389722066} is an apocalyptic number.

1618389722066 is a deficient number, since it is larger than the sum of its proper divisors (1024069106734).

1618389722066 is a wasteful number, since it uses less digits than its factorization.

1618389722066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404858.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 1618389722066 in words is "one trillion, six hundred eighteen billion, three hundred eighty-nine million, seven hundred twenty-two thousand, sixty-six".