6505151666 has 16 divisors (see below), whose sum is σ = 10512561024. Its totient is φ = 3001166544.

The previous prime is 6505151603. The next prime is 6505151669. The reversal of 6505151666 is 6661515056.

It is not an unprimeable number, because it can be changed into a prime (6505151669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16925 + ... + 115311.

It is an arithmetic number, because the mean of its divisors is an integer number (657035064).

Almost surely, 2^6505151666 is an apocalyptic number.

6505151666 is a deficient number, since it is larger than the sum of its proper divisors (4007409358).

6505151666 is a wasteful number, since it uses less digits than its factorization.

6505151666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100945.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 6505151666 is about 80654.5204312815. The cubic root of 6505151666 is about 1866.7484905388.

The spelling of 6505151666 in words is "six billion, five hundred five million, one hundred fifty-one thousand, six hundred sixty-six".