166420423301155 has 16 divisors (see below), whose sum is σ = 200542782956544. Its totient is φ = 132577714252000.

The previous prime is 166420423301149. The next prime is 166420423301203. The reversal of 166420423301155 is 551103324024661.

It is not a de Polignac number, because 166420423301155 - 2¹¹ = 166420423299107 is a prime.

It is a super-2 number, since 2×166420423301155² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8195749 + ... + 20000278.

It is an arithmetic number, because the mean of its divisors is an integer number (12533923934784).

Almost surely, 2^{166420423301155} is an apocalyptic number.

166420423301155 is a deficient number, since it is larger than the sum of its proper divisors (34122359655389).

166420423301155 is a wasteful number, since it uses less digits than its factorization.

166420423301155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28200986.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 166420423301155 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-three million, three hundred one thousand, one hundred fifty-five".