66121834 has 8 divisors (see below), whose sum is σ = 99731268. Its totient is φ = 32878080.

The previous prime is 66121801. The next prime is 66121841. The reversal of 66121834 is 43812166.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 62331025 + 3790809 = 7895^2 + 1947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66121796 and 66121805.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90967 + ... + 91690.

Almost surely, 2^66121834 is an apocalyptic number.

66121834 is a deficient number, since it is larger than the sum of its proper divisors (33609434).

66121834 is a wasteful number, since it uses less digits than its factorization.

66121834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182840.

The product of its digits is 6912, while the sum is 31.

The square root of 66121834 is about 8131.5333117439. The cubic root of 66121834 is about 404.3725160956.

The spelling of 66121834 in words is "sixty-six million, one hundred twenty-one thousand, eight hundred thirty-four".