6461665101 has 12 divisors (see below), whose sum is σ = 9416115228. Its totient is φ = 4269654144.

The previous prime is 6461665087. The next prime is 6461665109. The reversal of 6461665101 is 1015661646.

It is a happy number.

6461665101 is a `hidden beast` number, since 646 + 1 + 6 + 6 + 5 + 1 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1110888900 + 5350776201 = 33330^2 + 73149^2 .

It is not a de Polignac number, because 6461665101 - 2⁵ = 6461665069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461665109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3175810 + ... + 3177843.

It is an arithmetic number, because the mean of its divisors is an integer number (784676269).

Almost surely, 2^6461665101 is an apocalyptic number.

It is an amenable number.

6461665101 is a deficient number, since it is larger than the sum of its proper divisors (2954450127).

6461665101 is a wasteful number, since it uses less digits than its factorization.

6461665101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6353772 (or 6353769 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 6461665101 is about 80384.4829615766. The cubic root of 6461665101 is about 1862.5794847150.

The spelling of 6461665101 in words is "six billion, four hundred sixty-one million, six hundred sixty-five thousand, one hundred one".