551665577 has 2 divisors, whose sum is σ = 551665578. Its totient is φ = 551665576.

The previous prime is 551665547. The next prime is 551665613. The reversal of 551665577 is 775566155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498360976 + 53304601 = 22324^2 + 7301^2 .

It is a cyclic number.

It is not a de Polignac number, because 551665577 - 2²⁶ = 484556713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551665547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275832788 + 275832789.

It is an arithmetic number, because the mean of its divisors is an integer number (275832789).

Almost surely, 2^551665577 is an apocalyptic number.

It is an amenable number.

551665577 is a deficient number, since it is larger than the sum of its proper divisors (1).

551665577 is an equidigital number, since it uses as much as digits as its factorization.

551665577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102500, while the sum is 47.

The square root of 551665577 is about 23487.5621766074. The cubic root of 551665577 is about 820.1474932983.

The spelling of 551665577 in words is "five hundred fifty-one million, six hundred sixty-five thousand, five hundred seventy-seven".