6650516515651 has 4 divisors (see below), whose sum is σ = 6650521737352. Its totient is φ = 6650511293952.

The previous prime is 6650516515499. The next prime is 6650516515663. The reversal of 6650516515651 is 1565156150566.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6650516515651 - 2³¹ = 6648369032003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6650516518651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694240 + ... + 3712546.

It is an arithmetic number, because the mean of its divisors is an integer number (1662630434338).

Almost surely, 2^{6650516515651} is an apocalyptic number.

6650516515651 is a deficient number, since it is larger than the sum of its proper divisors (5221701).

6650516515651 is a wasteful number, since it uses less digits than its factorization.

6650516515651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5221700.

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 6650516515651 in words is "six trillion, six hundred fifty billion, five hundred sixteen million, five hundred fifteen thousand, six hundred fifty-one".