27666066525 has 24 divisors (see below), whose sum is σ = 45856496544. Its totient is φ = 14718052800.

The previous prime is 27666066521. The next prime is 27666066541. The reversal of 27666066525 is 52566066672.

It is not a de Polignac number, because 27666066525 - 2² = 27666066521 is a prime.

It is a super-2 number, since 2×27666066525² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27666066521) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 434811 + ... + 494360.

It is an arithmetic number, because the mean of its divisors is an integer number (1910687356).

Almost surely, 2^27666066525 is an apocalyptic number.

27666066525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27666066525 is a deficient number, since it is larger than the sum of its proper divisors (18190430019).

27666066525 is a wasteful number, since it uses less digits than its factorization.

27666066525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929581 (or 929576 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 27666066525 in words is "twenty-seven billion, six hundred sixty-six million, sixty-six thousand, five hundred twenty-five".