66003278 has 16 divisors (see below), whose sum is σ = 111490560. Its totient is φ = 29033400.

The previous prime is 66003277. The next prime is 66003293. The reversal of 66003278 is 87230066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66003277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47708 + ... + 49071.

It is an arithmetic number, because the mean of its divisors is an integer number (6968160).

Almost surely, 2^66003278 is an apocalyptic number.

66003278 is a deficient number, since it is larger than the sum of its proper divisors (45487282).

66003278 is a wasteful number, since it uses less digits than its factorization.

66003278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96823.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66003278 is about 8124.2401490847. The cubic root of 66003278 is about 404.1306924488.

The spelling of 66003278 in words is "sixty-six million, three thousand, two hundred seventy-eight".