55166826 has 64 divisors (see below), whose sum is σ = 130999680. Its totient is φ = 15267840.

The previous prime is 55166821. The next prime is 55166831. The reversal of 55166826 is 62866155.

It is an interprime number because it is at equal distance from previous prime (55166821) and next prime (55166831).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55166821) 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, 96670 + ... + 97238.

It is an arithmetic number, because the mean of its divisors is an integer number (2046870).

Almost surely, 2^55166826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55166826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65499840).

55166826 is an abundant number, since it is smaller than the sum of its proper divisors (75832854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55166826 is a wasteful number, since it uses less digits than its factorization.

55166826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its digits is 86400, while the sum is 39.

The square root of 55166826 is about 7427.4373777232. The cubic root of 55166826 is about 380.6793618177.

The spelling of 55166826 in words is "fifty-five million, one hundred sixty-six thousand, eight hundred twenty-six".