66121234 has 4 divisors (see below), whose sum is σ = 99181854. Its totient is φ = 33060616.

The previous prime is 66121201. The next prime is 66121243. The reversal of 66121234 is 43212166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43212166 = 2 ⋅21606083.

It can be written as a sum of positive squares in only one way, i.e., 36036009 + 30085225 = 6003^2 + 5485^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66121199 and 66121208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16530307 + ... + 16530310.

Almost surely, 2^66121234 is an apocalyptic number.

66121234 is a deficient number, since it is larger than the sum of its proper divisors (33060620).

66121234 is a wasteful number, since it uses less digits than its factorization.

66121234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33060619.

The product of its digits is 1728, while the sum is 25.

The square root of 66121234 is about 8131.4964182492. The cubic root of 66121234 is about 404.3712929785.

The spelling of 66121234 in words is "sixty-six million, one hundred twenty-one thousand, two hundred thirty-four".