6601604377 has 2 divisors, whose sum is σ = 6601604378. Its totient is φ = 6601604376.

The previous prime is 6601604323. The next prime is 6601604393. The reversal of 6601604377 is 7734061066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3313614096 + 3287990281 = 57564^2 + 57341^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601604377 - 2⁷ = 6601604249 is a prime.

It is not a weakly prime, because it can be changed into another prime (6601604677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300802188 + 3300802189.

It is an arithmetic number, because the mean of its divisors is an integer number (3300802189).

Almost surely, 2^6601604377 is an apocalyptic number.

It is an amenable number.

6601604377 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601604377 is an equidigital number, since it uses as much as digits as its factorization.

6601604377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 6601604377 is about 81250.2577042067. The cubic root of 6601604377 is about 1875.9294356894.

The spelling of 6601604377 in words is "six billion, six hundred one million, six hundred four thousand, three hundred seventy-seven".