6505601066 has 4 divisors (see below), whose sum is σ = 9758401602. Its totient is φ = 3252800532.

The previous prime is 6505601057. The next prime is 6505601071. The reversal of 6505601066 is 6601065056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5968335025 + 537266041 = 77255^2 + 23179^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1626400265 + ... + 1626400268.

Almost surely, 2^6505601066 is an apocalyptic number.

6505601066 is a deficient number, since it is larger than the sum of its proper divisors (3252800536).

6505601066 is a wasteful number, since it uses less digits than its factorization.

6505601066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252800535.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 6505601066 is about 80657.3063398475. The cubic root of 6505601066 is about 1866.7914768517.

The spelling of 6505601066 in words is "six billion, five hundred five million, six hundred one thousand, sixty-six".