66072963278 has 32 divisors (see below), whose sum is σ = 117162897600. Its totient is φ = 27929059200.

The previous prime is 66072963269. The next prime is 66072963287. The reversal of 66072963278 is 87236927066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66072963269) and next prime (66072963287).

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 609623 + ... + 709778.

It is an arithmetic number, because the mean of its divisors is an integer number (3661340550).

Almost surely, 2^66072963278 is an apocalyptic number.

66072963278 is a deficient number, since it is larger than the sum of its proper divisors (51089934322).

66072963278 is a wasteful number, since it uses less digits than its factorization.

66072963278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319497 (or 1319483 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 66072963278 in words is "sixty-six billion, seventy-two million, nine hundred sixty-three thousand, two hundred seventy-eight".