166420415524063 has 4 divisors (see below), whose sum is σ = 167522537481328. Its totient is φ = 165318293566800.

The previous prime is 166420415524019. The next prime is 166420415524123. The reversal of 166420415524063 is 360425514024661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166420415524063 - 2¹⁷ = 166420415392991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166420415523998 and 166420415524016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166420415624063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551060978406 + ... + 551060978707.

It is an arithmetic number, because the mean of its divisors is an integer number (41880634370332).

Almost surely, 2^{166420415524063} is an apocalyptic number.

166420415524063 is a deficient number, since it is larger than the sum of its proper divisors (1102121957265).

166420415524063 is a wasteful number, since it uses less digits than its factorization.

166420415524063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102121957264.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 166420415524063 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred fifteen million, five hundred twenty-four thousand, sixty-three".