166425554020 has 24 divisors (see below), whose sum is σ = 381265815168. Its totient is φ = 60518383200.

The previous prime is 166425554011. The next prime is 166425554021. The reversal of 166425554020 is 20455524661.

It is a happy number.

It is a super-3 number, since 3×166425554020³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166425554021) 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, 378239676 + ... + 378240115.

It is an arithmetic number, because the mean of its divisors is an integer number (15886075632).

Almost surely, 2^166425554020 is an apocalyptic number.

166425554020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166425554020 is an abundant number, since it is smaller than the sum of its proper divisors (214840261148).

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

166425554020 is a wasteful number, since it uses less digits than its factorization.

166425554020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756479811 (or 756479809 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 166425554020 in words is "one hundred sixty-six billion, four hundred twenty-five million, five hundred fifty-four thousand, twenty".