6651611077 has 2 divisors, whose sum is σ = 6651611078. Its totient is φ = 6651611076.

The previous prime is 6651611041. The next prime is 6651611107. The reversal of 6651611077 is 7701161566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5214139681 + 1437471396 = 72209^2 + 37914^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651611077 - 2⁷ = 6651610949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6651611377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325805538 + 3325805539.

It is an arithmetic number, because the mean of its divisors is an integer number (3325805539).

Almost surely, 2^6651611077 is an apocalyptic number.

It is an amenable number.

6651611077 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651611077 is an equidigital number, since it uses as much as digits as its factorization.

6651611077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 6651611077 is about 81557.4097001615. The cubic root of 6651611077 is about 1880.6542046638.

The spelling of 6651611077 in words is "six billion, six hundred fifty-one million, six hundred eleven thousand, seventy-seven".