55507663 has 2 divisors, whose sum is σ = 55507664. Its totient is φ = 55507662.

The previous prime is 55507643. The next prime is 55507679. The reversal of 55507663 is 36670555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55507663 is a prime.

It is a super-2 number, since 2×55507663² = 6162201303443138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55507603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753831 + 27753832.

It is an arithmetic number, because the mean of its divisors is an integer number (27753832).

Almost surely, 2^55507663 is an apocalyptic number.

55507663 is a deficient number, since it is larger than the sum of its proper divisors (1).

55507663 is an equidigital number, since it uses as much as digits as its factorization.

55507663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 37.

The square root of 55507663 is about 7450.3465020092. The cubic root of 55507663 is about 381.4617360809.

The spelling of 55507663 in words is "fifty-five million, five hundred seven thousand, six hundred sixty-three".