8055511661 has 2 divisors, whose sum is σ = 8055511662. Its totient is φ = 8055511660.

The previous prime is 8055511621. The next prime is 8055511669. The reversal of 8055511661 is 1661155508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5684406025 + 2371105636 = 75395^2 + 48694^2 .

It is a cyclic number.

It is not a de Polignac number, because 8055511661 - 2¹⁴ = 8055495277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8055511669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4027755830 + 4027755831.

It is an arithmetic number, because the mean of its divisors is an integer number (4027755831).

Almost surely, 2^8055511661 is an apocalyptic number.

It is an amenable number.

8055511661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8055511661 is an equidigital number, since it uses as much as digits as its factorization.

8055511661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 8055511661 is about 89752.5022548118. The cubic root of 8055511661 is about 2004.6153130003.

The spelling of 8055511661 in words is "eight billion, fifty-five million, five hundred eleven thousand, six hundred sixty-one".