55666501505103 has 16 divisors (see below), whose sum is σ = 74807984599040. Its totient is φ = 36818021874816.

The previous prime is 55666501505101. The next prime is 55666501505201. The reversal of 55666501505103 is 30150510566655.

It is not a de Polignac number, because 55666501505103 - 2¹ = 55666501505101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666501505101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17102808 + ... + 20095746.

It is an arithmetic number, because the mean of its divisors is an integer number (4675499037440).

Almost surely, 2^{55666501505103} is an apocalyptic number.

55666501505103 is a deficient number, since it is larger than the sum of its proper divisors (19141483093937).

55666501505103 is a wasteful number, since it uses less digits than its factorization.

55666501505103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041886.

The product of its (nonzero) digits is 2025000, while the sum is 48.

The spelling of 55666501505103 in words is "fifty-five trillion, six hundred sixty-six billion, five hundred one million, five hundred five thousand, one hundred three".