55500666 has 32 divisors (see below), whose sum is σ = 122777088. Its totient is φ = 16614720.

The previous prime is 55500661. The next prime is 55500671. The reversal of 55500666 is 66600555.

It is an interprime number because it is at equal distance from previous prime (55500661) and next prime (55500671).

It is a Curzon number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55500661) 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, 6730 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (3836784).

Almost surely, 2^55500666 is an apocalyptic number.

55500666 is an abundant number, since it is smaller than the sum of its proper divisors (67276422).

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

55500666 is a wasteful number, since it uses less digits than its factorization.

55500666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19286.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 55500666 is about 7449.8769117349. The cubic root of 55500666 is about 381.4457070633.

Adding to 55500666 its reverse (66600555), we get a palindrome (122101221).

The spelling of 55500666 in words is "fifty-five million, five hundred thousand, six hundred sixty-six".