166420611453426 has 32 divisors (see below), whose sum is σ = 363149277058368. Its totient is φ = 50423577047040.

The previous prime is 166420611453409. The next prime is 166420611453451. The reversal of 166420611453426 is 624354116024661.

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, 172296555 + ... + 173259758.

It is an arithmetic number, because the mean of its divisors is an integer number (11348414908074).

Almost surely, 2^{166420611453426} is an apocalyptic number.

166420611453426 is an abundant number, since it is smaller than the sum of its proper divisors (196728665604942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166420611453426 is a wasteful number, since it uses less digits than its factorization.

166420611453426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345563626.

The product of its (nonzero) digits is 4976640, while the sum is 51.

The spelling of 166420611453426 in words is "one hundred sixty-six trillion, four hundred twenty billion, six hundred eleven million, four hundred fifty-three thousand, four hundred twenty-six".