6616774061 has 2 divisors, whose sum is σ = 6616774062. Its totient is φ = 6616774060.

The previous prime is 6616774057. The next prime is 6616774097. The reversal of 6616774061 is 1604776166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6216534025 + 400240036 = 78845^2 + 20006^2 .

It is a cyclic number.

It is not a de Polignac number, because 6616774061 - 2² = 6616774057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6616774361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3308387030 + 3308387031.

It is an arithmetic number, because the mean of its divisors is an integer number (3308387031).

Almost surely, 2^6616774061 is an apocalyptic number.

It is an amenable number.

6616774061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6616774061 is an equidigital number, since it uses as much as digits as its factorization.

6616774061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 6616774061 is about 81343.5557435253. Note that the first 3 decimals coincide. The cubic root of 6616774061 is about 1877.3652223962.

The spelling of 6616774061 in words is "six billion, six hundred sixteen million, seven hundred seventy-four thousand, sixty-one".