66278334 has 16 divisors (see below), whose sum is σ = 132636672. Its totient is φ = 22079448.

The previous prime is 66278309. The next prime is 66278353. The reversal of 66278334 is 43387266.

It is a junction number, because it is equal to n+sod(n) for n = 66278292 and 66278301.

It is a congruent number.

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, 16707 + ... + 20289.

It is an arithmetic number, because the mean of its divisors is an integer number (8289792).

Almost surely, 2^66278334 is an apocalyptic number.

66278334 is an abundant number, since it is smaller than the sum of its proper divisors (66358338).

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

66278334 is a wasteful number, since it uses less digits than its factorization.

66278334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671.

The product of its digits is 145152, while the sum is 39.

The square root of 66278334 is about 8141.1506557734. The cubic root of 66278334 is about 404.6912934822.

The spelling of 66278334 in words is "sixty-six million, two hundred seventy-eight thousand, three hundred thirty-four".