166126410454551 has 8 divisors (see below), whose sum is σ = 223192734657024. Its totient is φ = 109905513277560.

The previous prime is 166126410454481. The next prime is 166126410454573. The reversal of 166126410454551 is 155454014621661.

It is a happy number.

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

It is not a de Polignac number, because 166126410454551 - 2¹¹ = 166126410452503 is a prime.

It is a super-2 number, since 2×166126410454551² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166126410454494 and 166126410454503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166126410454951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211356755911 + ... + 211356756696.

It is an arithmetic number, because the mean of its divisors is an integer number (27899091832128).

Almost surely, 2^{166126410454551} is an apocalyptic number.

166126410454551 is a deficient number, since it is larger than the sum of its proper divisors (57066324202473).

166126410454551 is a wasteful number, since it uses less digits than its factorization.

166126410454551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422713512741.

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 166126410454551 in words is "one hundred sixty-six trillion, one hundred twenty-six billion, four hundred ten million, four hundred fifty-four thousand, five hundred fifty-one".