55665265807 has 2 divisors, whose sum is σ = 55665265808. Its totient is φ = 55665265806.

The previous prime is 55665265793. The next prime is 55665265811. The reversal of 55665265807 is 70856256655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55665265807 is a prime.

It is a super-2 number, since 2×55665265807² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55665265837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832632903 + 27832632904.

It is an arithmetic number, because the mean of its divisors is an integer number (27832632904).

Almost surely, 2^55665265807 is an apocalyptic number.

55665265807 is a deficient number, since it is larger than the sum of its proper divisors (1).

55665265807 is an equidigital number, since it uses as much as digits as its factorization.

55665265807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120000, while the sum is 55.

The spelling of 55665265807 in words is "fifty-five billion, six hundred sixty-five million, two hundred sixty-five thousand, eight hundred seven".