66278350 has 12 divisors (see below), whose sum is σ = 123277824. Its totient is φ = 26511320.

The previous prime is 66278309. The next prime is 66278353. The reversal of 66278350 is 5387266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66278353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 662734 + ... + 662833.

It is an arithmetic number, because the mean of its divisors is an integer number (10273152).

Almost surely, 2^66278350 is an apocalyptic number.

66278350 is a deficient number, since it is larger than the sum of its proper divisors (56999474).

66278350 is a wasteful number, since it uses less digits than its factorization.

66278350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325579 (or 1325574 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 66278350 is about 8141.1516384354. The cubic root of 66278350 is about 404.6913260472.

The spelling of 66278350 in words is "sixty-six million, two hundred seventy-eight thousand, three hundred fifty".