515050551666 has 80 divisors (see below), whose sum is σ = 1320375805056. Its totient is φ = 146999945664.

The previous prime is 515050551643. The next prime is 515050551749. The reversal of 515050551666 is 666155050515.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 820195 + ... + 1304921.

Almost surely, 2^515050551666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 515050551666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660187902528).

515050551666 is an abundant number, since it is smaller than the sum of its proper divisors (805325253390).

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

515050551666 is a wasteful number, since it uses less digits than its factorization.

515050551666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485685 (or 485676 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 515050551666 in words is "five hundred fifteen billion, fifty million, five hundred fifty-one thousand, six hundred sixty-six".