551666005049 has 2 divisors, whose sum is σ = 551666005050. Its totient is φ = 551666005048.

The previous prime is 551666004937. The next prime is 551666005169. The reversal of 551666005049 is 940500666155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551518625449 + 147379600 = 742643^2 + 12140^2 .

It is a cyclic number.

It is not a de Polignac number, because 551666005049 - 2¹² = 551666000953 is a prime.

It is a super-2 number, since 2×551666005049² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 551666004994 and 551666005012.

It is not a weakly prime, because it can be changed into another prime (551666005349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275833002524 + 275833002525.

It is an arithmetic number, because the mean of its divisors is an integer number (275833002525).

Almost surely, 2^551666005049 is an apocalyptic number.

It is an amenable number.

551666005049 is a deficient number, since it is larger than the sum of its proper divisors (1).

551666005049 is an equidigital number, since it uses as much as digits as its factorization.

551666005049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 551666005049 in words is "five hundred fifty-one billion, six hundred sixty-six million, five thousand, forty-nine".