66103078 has 4 divisors (see below), whose sum is σ = 99154620. Its totient is φ = 33051538.

The previous prime is 66103061. The next prime is 66103091. The reversal of 66103078 is 87030166.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 16525768 + ... + 16525771.

It is an arithmetic number, because the mean of its divisors is an integer number (24788655).

Almost surely, 2^66103078 is an apocalyptic number.

66103078 is a deficient number, since it is larger than the sum of its proper divisors (33051542).

66103078 is a wasteful number, since it uses less digits than its factorization.

66103078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33051541.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 66103078 is about 8130.3799419215. The cubic root of 66103078 is about 404.3342779541.

The spelling of 66103078 in words is "sixty-six million, one hundred three thousand, seventy-eight".