166420610066455 has 4 divisors (see below), whose sum is σ = 199704732079752. Its totient is φ = 133136488053160.

The previous prime is 166420610066437. The next prime is 166420610066467. The reversal of 166420610066455 is 554660016024661.

166420610066455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166420610066455 - 2¹¹ = 166420610064407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16642061006641 + ... + 16642061006650.

It is an arithmetic number, because the mean of its divisors is an integer number (49926183019938).

Almost surely, 2^{166420610066455} is an apocalyptic number.

166420610066455 is a deficient number, since it is larger than the sum of its proper divisors (33284122013297).

166420610066455 is an equidigital number, since it uses as much as digits as its factorization.

166420610066455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33284122013296.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 166420610066455 in words is "one hundred sixty-six trillion, four hundred twenty billion, six hundred ten million, sixty-six thousand, four hundred fifty-five".