166600422472420 has 24 divisors (see below), whose sum is σ = 350061841249848. Its totient is φ = 66601892025600.

The previous prime is 166600422472303. The next prime is 166600422472427. The reversal of 166600422472420 is 24274224006661.

It can be written as a sum of positive squares in 4 ways, for example, as 11901354627556 + 154699067844864 = 3449834^2 + 12437808^2 .

It is not an unprimeable number, because it can be changed into a prime (166600422472427) 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, 2392274521 + ... + 2392344160.

It is an arithmetic number, because the mean of its divisors is an integer number (14585910052077).

Almost surely, 2^{166600422472420} is an apocalyptic number.

166600422472420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166600422472420 is an abundant number, since it is smaller than the sum of its proper divisors (183461418777428).

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

166600422472420 is a wasteful number, since it uses less digits than its factorization.

166600422472420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4784620431 (or 4784620429 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 46.

The spelling of 166600422472420 in words is "one hundred sixty-six trillion, six hundred billion, four hundred twenty-two million, four hundred seventy-two thousand, four hundred twenty".