55666763 has 2 divisors, whose sum is σ = 55666764. Its totient is φ = 55666762.

The previous prime is 55666757. The next prime is 55666771. The reversal of 55666763 is 36766655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55666763 is a prime.

It is not a weakly prime, because it can be changed into another prime (55656763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27833381 + 27833382.

It is an arithmetic number, because the mean of its divisors is an integer number (27833382).

Almost surely, 2^55666763 is an apocalyptic number.

55666763 is a deficient number, since it is larger than the sum of its proper divisors (1).

55666763 is an equidigital number, since it uses as much as digits as its factorization.

55666763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 44.

The square root of 55666763 is about 7461.0162176476. The cubic root of 55666763 is about 381.8258459827.

The spelling of 55666763 in words is "fifty-five million, six hundred sixty-six thousand, seven hundred sixty-three".