55566751 has 2 divisors, whose sum is σ = 55566752. Its totient is φ = 55566750.

The previous prime is 55566743. The next prime is 55566799. The reversal of 55566751 is 15766555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55566751 - 2³ = 55566743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55566701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27783375 + 27783376.

It is an arithmetic number, because the mean of its divisors is an integer number (27783376).

Almost surely, 2^55566751 is an apocalyptic number.

55566751 is a deficient number, since it is larger than the sum of its proper divisors (1).

55566751 is an equidigital number, since it uses as much as digits as its factorization.

55566751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157500, while the sum is 40.

The square root of 55566751 is about 7454.3109004119. The cubic root of 55566751 is about 381.5970436323.

The spelling of 55566751 in words is "fifty-five million, five hundred sixty-six thousand, seven hundred fifty-one".