66025436866278 has 48 divisors (see below), whose sum is σ = 143862412133376. Its totient is φ = 20177552841840.

The previous prime is 66025436866271. The next prime is 66025436866349. The reversal of 66025436866278 is 87266863452066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66025436866271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491588626 + ... + 491722917.

It is an arithmetic number, because the mean of its divisors is an integer number (2997133586112).

Almost surely, 2^{66025436866278} is an apocalyptic number.

66025436866278 is an abundant number, since it is smaller than the sum of its proper divisors (77836975267098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66025436866278 is a wasteful number, since it uses less digits than its factorization.

66025436866278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983311617 (or 983311598 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 69.

The spelling of 66025436866278 in words is "sixty-six trillion, twenty-five billion, four hundred thirty-six million, eight hundred sixty-six thousand, two hundred seventy-eight".