5601661065 has 192 divisors, whose sum is σ = 13392916992. Its totient is φ = 2090188800.

The previous prime is 5601661061. The next prime is 5601661081.

5601661065 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5601661065 - 2² = 5601661061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5601661061) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1664985 + ... + 1668345.

It is an arithmetic number, because the mean of its divisors is an integer number (69754776).

Almost surely, 2^5601661065 is an apocalyptic number.

5601661065 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5601661065 is an abundant number, since it is smaller than the sum of its proper divisors (7791255927).

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

5601661065 is a wasteful number, since it uses less digits than its factorization.

5601661065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 3437 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 5601661065 is about 74844.2453699682. The cubic root of 5601661065 is about 1775.9835654448.

It can be divided in two parts, 5601 and 661065, that added together give a palindrome (666666).

The spelling of 5601661065 in words is "five billion, six hundred one million, six hundred sixty-one thousand, sixty-five".