6601134721 has 8 divisors (see below), whose sum is σ = 6680931840. Its totient is φ = 6521687568.

The previous prime is 6601134713. The next prime is 6601134737. The reversal of 6601134721 is 1274311066.

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

It is a cyclic number.

It is not a de Polignac number, because 6601134721 - 2³ = 6601134713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6601134791) 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, 49441 + ... + 125086.

It is an arithmetic number, because the mean of its divisors is an integer number (835116480).

Almost surely, 2^6601134721 is an apocalyptic number.

It is an amenable number.

6601134721 is a deficient number, since it is larger than the sum of its proper divisors (79797119).

6601134721 is a wasteful number, since it uses less digits than its factorization.

6601134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174983.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 6601134721 is about 81247.3674711987. The cubic root of 6601134721 is about 1875.8849484023.

Adding to 6601134721 its reverse (1274311066), we get a palindrome (7875445787).

The spelling of 6601134721 in words is "six billion, six hundred one million, one hundred thirty-four thousand, seven hundred twenty-one".