27666401390 has 32 divisors (see below), whose sum is σ = 50219597376. Its totient is φ = 10973583360.

The previous prime is 27666401381. The next prime is 27666401407. The reversal of 27666401390 is 9310466672.

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, 577184 + ... + 623276.

It is an arithmetic number, because the mean of its divisors is an integer number (1569362418).

Almost surely, 2^27666401390 is an apocalyptic number.

27666401390 is a deficient number, since it is larger than the sum of its proper divisors (22553195986).

27666401390 is a wasteful number, since it uses less digits than its factorization.

27666401390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46604.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 27666401390 in words is "twenty-seven billion, six hundred sixty-six million, four hundred one thousand, three hundred ninety".