55166611605 has 32 divisors (see below), whose sum is σ = 100891699200. Its totient is φ = 25215120192.

The previous prime is 55166611603. The next prime is 55166611607. The reversal of 55166611605 is 50611666155.

55166611605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55166611603) and next prime (55166611607).

It is not a de Polignac number, because 55166611605 - 2¹ = 55166611603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166611603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706186 + ... + 780404.

It is an arithmetic number, because the mean of its divisors is an integer number (3152865600).

Almost surely, 2^55166611605 is an apocalyptic number.

It is an amenable number.

55166611605 is a deficient number, since it is larger than the sum of its proper divisors (45725087595).

55166611605 is a wasteful number, since it uses less digits than its factorization.

55166611605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81313.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 55166611605 in words is "fifty-five billion, one hundred sixty-six million, six hundred eleven thousand, six hundred five".