166420423301210 has 16 divisors (see below), whose sum is σ = 322599589784136. Its totient is φ = 61447540911168.

The previous prime is 166420423301203. The next prime is 166420423301263. The reversal of 166420423301210 is 12103324024661.

It can be written as a sum of positive squares in 4 ways, for example, as 78031976612041 + 88388446689169 = 8833571^2 + 9401513^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640078551029 + ... + 640078551288.

Almost surely, 2^{166420423301210} is an apocalyptic number.

166420423301210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166420423301210 is a deficient number, since it is larger than the sum of its proper divisors (156179166482926).

166420423301210 is a wasteful number, since it uses less digits than its factorization.

166420423301210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280157102337.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 166420423301210 its reverse (12103324024661), we get a palindrome (178523747325871).

The spelling of 166420423301210 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-three million, three hundred one thousand, two hundred ten".