6641061553 has 8 divisors (see below), whose sum is σ = 7607816000. Its totient is φ = 5678814960.

The previous prime is 6641061533. The next prime is 6641061563. The reversal of 6641061553 is 3551601466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6641061553 - 2¹³ = 6641053361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6641061503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1123803 + ... + 1129696.

It is an arithmetic number, because the mean of its divisors is an integer number (950977000).

Almost surely, 2^6641061553 is an apocalyptic number.

It is an amenable number.

6641061553 is a deficient number, since it is larger than the sum of its proper divisors (966754447).

6641061553 is a wasteful number, since it uses less digits than its factorization.

6641061553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253927.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6641061553 is about 81492.7085879467. The cubic root of 6641061553 is about 1879.6594328956.

The spelling of 6641061553 in words is "six billion, six hundred forty-one million, sixty-one thousand, five hundred fifty-three".