6550660161551 has 4 divisors (see below), whose sum is σ = 7146174721704. Its totient is φ = 5955145601400.

The previous prime is 6550660161511. The next prime is 6550660161587. The reversal of 6550660161551 is 1551610660556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6550660161551 is a prime.

It is a super-2 number, since 2×6550660161551² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6550660161496 and 6550660161505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6550660161511) 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, 297757280060 + ... + 297757280081.

It is an arithmetic number, because the mean of its divisors is an integer number (1786543680426).

Almost surely, 2^{6550660161551} is an apocalyptic number.

6550660161551 is a deficient number, since it is larger than the sum of its proper divisors (595514560153).

6550660161551 is a wasteful number, since it uses less digits than its factorization.

6550660161551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595514560152.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 6550660161551 in words is "six trillion, five hundred fifty billion, six hundred sixty million, one hundred sixty-one thousand, five hundred fifty-one".