166360421601355 has 64 divisors (see below), whose sum is σ = 206673647431680. Its totient is φ = 128472303246336.

The previous prime is 166360421601317. The next prime is 166360421601371. The reversal of 166360421601355 is 553106124063661.

It is a cyclic number.

It is not a de Polignac number, because 166360421601355 - 2²⁷ = 166360287383627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166360421601299 and 166360421601308.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25700664399 + ... + 25700670871.

It is an arithmetic number, because the mean of its divisors is an integer number (3229275741120).

Almost surely, 2^{166360421601355} is an apocalyptic number.

166360421601355 is a deficient number, since it is larger than the sum of its proper divisors (40313225830325).

166360421601355 is a wasteful number, since it uses less digits than its factorization.

166360421601355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8780.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 166360421601355 in words is "one hundred sixty-six trillion, three hundred sixty billion, four hundred twenty-one million, six hundred one thousand, three hundred fifty-five".