166238126 has 4 divisors (see below), whose sum is σ = 249357192. Its totient is φ = 83119062.

The previous prime is 166238119. The next prime is 166238131. The reversal of 166238126 is 621832661.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×166238126² = 55270229071983752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41559530 + ... + 41559533.

It is an arithmetic number, because the mean of its divisors is an integer number (62339298).

Almost surely, 2^166238126 is an apocalyptic number.

166238126 is a deficient number, since it is larger than the sum of its proper divisors (83119066).

166238126 is an equidigital number, since it uses as much as digits as its factorization.

166238126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83119065.

The product of its digits is 20736, while the sum is 35.

The square root of 166238126 is about 12893.3364960355. The cubic root of 166238126 is about 549.8491332762.

The spelling of 166238126 in words is "one hundred sixty-six million, two hundred thirty-eight thousand, one hundred twenty-six".