55667220 has 48 divisors (see below), whose sum is σ = 178136448. Its totient is φ = 12723840.

The previous prime is 55667219. The next prime is 55667239. The reversal of 55667220 is 2276655.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65851 + ... + 66690.

It is an arithmetic number, because the mean of its divisors is an integer number (3711176).

Almost surely, 2^55667220 is an apocalyptic number.

It is an amenable number.

55667220 is an abundant number, since it is smaller than the sum of its proper divisors (122469228).

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

55667220 is a wasteful number, since it uses less digits than its factorization.

55667220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132560 (or 132558 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 55667220 is about 7461.0468434396. The cubic root of 55667220 is about 381.8268908547.

It can be divided in two parts, 556 and 67220, that added together give a palindrome (67776).

The spelling of 55667220 in words is "fifty-five million, six hundred sixty-seven thousand, two hundred twenty".