6601620993 has 16 divisors (see below), whose sum is σ = 9861882816. Its totient is φ = 3892847040.

The previous prime is 6601620989. The next prime is 6601621009. The reversal of 6601620993 is 3990261066.

It is not a de Polignac number, because 6601620993 - 2² = 6601620989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6601620923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2702146 + ... + 2704587.

It is an arithmetic number, because the mean of its divisors is an integer number (616367676).

Almost surely, 2^6601620993 is an apocalyptic number.

It is an amenable number.

6601620993 is a deficient number, since it is larger than the sum of its proper divisors (3260261823).

6601620993 is a wasteful number, since it uses less digits than its factorization.

6601620993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5406784.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 6601620993 is about 81250.3599561257. The cubic root of 6601620993 is about 1875.9310095703.

The spelling of 6601620993 in words is "six billion, six hundred one million, six hundred twenty thousand, nine hundred ninety-three".