61604663 has 2 divisors, whose sum is σ = 61604664. Its totient is φ = 61604662.

The previous prime is 61604659. The next prime is 61604677. The reversal of 61604663 is 36640616.

61604663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61604663 - 2² = 61604659 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61604633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802331 + 30802332.

It is an arithmetic number, because the mean of its divisors is an integer number (30802332).

Almost surely, 2^61604663 is an apocalyptic number.

61604663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61604663 is an equidigital number, since it uses as much as digits as its factorization.

61604663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 61604663 is about 7848.8638031246. The cubic root of 61604663 is about 394.9461294905.

The spelling of 61604663 in words is "sixty-one million, six hundred four thousand, six hundred sixty-three".