166370580905 has 8 divisors (see below), whose sum is σ = 199647423432. Its totient is φ = 133094647168.

The previous prime is 166370580889. The next prime is 166370580931. The reversal of 166370580905 is 509085073661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30221388649 + 136149192256 = 173843^2 + 368984^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166370580905 - 2⁴ = 166370580889 is a prime.

It is a Duffinian 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, 277469 + ... + 640101.

It is an arithmetic number, because the mean of its divisors is an integer number (24955927929).

Almost surely, 2^166370580905 is an apocalyptic number.

It is an amenable number.

166370580905 is a deficient number, since it is larger than the sum of its proper divisors (33276842527).

166370580905 is an equidigital number, since it uses as much as digits as its factorization.

166370580905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454395.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 166370580905 in words is "one hundred sixty-six billion, three hundred seventy million, five hundred eighty thousand, nine hundred five".