55166670 has 160 divisors (see below), whose sum is σ = 165876480. Its totient is φ = 13141440.

The previous prime is 55166669. The next prime is 55166677. The reversal of 55166670 is 7666155.

55166670 = T₇₂ + T₇₃ + ... + T₆₉₁.

It is a happy number.

It is a super-2 number, since 2×55166670² = 6086722957777800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166677) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1779555 + ... + 1779585.

It is an arithmetic number, because the mean of its divisors is an integer number (1036728).

Almost surely, 2^55166670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55166670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82938240).

55166670 is an abundant number, since it is smaller than the sum of its proper divisors (110709810).

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

55166670 is a wasteful number, since it uses less digits than its factorization.

55166670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 55166670 is about 7427.4268761126. The cubic root of 55166670 is about 380.6790029907.

The spelling of 55166670 in words is "fifty-five million, one hundred sixty-six thousand, six hundred seventy".