51055151666 has 8 divisors (see below), whose sum is σ = 76659543660. Its totient is φ = 25501970448.

The previous prime is 51055151603. The next prime is 51055151671. The reversal of 51055151666 is 66615155015.

It can be written as a sum of positive squares in 2 ways, for example, as 36393574441 + 14661577225 = 190771^2 + 121085^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12800201 + ... + 12804188.

Almost surely, 2^51055151666 is an apocalyptic number.

51055151666 is a deficient number, since it is larger than the sum of its proper divisors (25604391994).

51055151666 is a wasteful number, since it uses less digits than its factorization.

51055151666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25605388.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 51055151666 in words is "fifty-one billion, fifty-five million, one hundred fifty-one thousand, six hundred sixty-six".