278001380066 has 8 divisors (see below), whose sum is σ = 417053079120. Its totient is φ = 138983687028.

The previous prime is 278001379987. The next prime is 278001380089. The reversal of 278001380066 is 660083100872.

It is a happy number.

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8481056 + ... + 8513771.

It is an arithmetic number, because the mean of its divisors is an integer number (52131634890).

Almost surely, 2^278001380066 is an apocalyptic number.

278001380066 is a deficient number, since it is larger than the sum of its proper divisors (139051699054).

278001380066 is a wasteful number, since it uses less digits than its factorization.

278001380066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17003008.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 278001380066 in words is "two hundred seventy-eight billion, one million, three hundred eighty thousand, sixty-six".