66898278767 has 8 divisors (see below), whose sum is σ = 67066868400. Its totient is φ = 66729890880.

The previous prime is 66898278763. The next prime is 66898278787. The reversal of 66898278767 is 76787289866.

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

It is a cyclic number.

It is not a de Polignac number, because 66898278767 - 2² = 66898278763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66898278694 and 66898278703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66898278761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624917 + ... + 724097.

It is an arithmetic number, because the mean of its divisors is an integer number (8383358550).

Almost surely, 2^66898278767 is an apocalyptic number.

66898278767 is a deficient number, since it is larger than the sum of its proper divisors (168589633).

66898278767 is a wasteful number, since it uses less digits than its factorization.

66898278767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100873.

The product of its digits is 682795008, while the sum is 74.

The spelling of 66898278767 in words is "sixty-six billion, eight hundred ninety-eight million, two hundred seventy-eight thousand, seven hundred sixty-seven".