6661195953 has 8 divisors (see below), whose sum is σ = 8883032448. Its totient is φ = 4440078384.

The previous prime is 6661195949. The next prime is 6661195963. The reversal of 6661195953 is 3595911666.

It is a happy number.

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

It is not a de Polignac number, because 6661195953 - 2² = 6661195949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6661195896 and 6661195905.

It is not an unprimeable number, because it can be changed into a prime (6661195963) 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, 157726 + ... + 195447.

It is an arithmetic number, because the mean of its divisors is an integer number (1110379056).

Almost surely, 2^6661195953 is an apocalyptic number.

It is an amenable number.

6661195953 is a deficient number, since it is larger than the sum of its proper divisors (2221836495).

6661195953 is a wasteful number, since it uses less digits than its factorization.

6661195953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359463.

The product of its digits is 1312200, while the sum is 51.

The square root of 6661195953 is about 81616.1500746023. The cubic root of 6661195953 is about 1881.5571030115.

The spelling of 6661195953 in words is "six billion, six hundred sixty-one million, one hundred ninety-five thousand, nine hundred fifty-three".