55660066 has 64 divisors (see below), whose sum is σ = 109486080. Its totient is φ = 20592000.

The previous prime is 55660051. The next prime is 55660081. The reversal of 55660066 is 66006655.

It is an interprime number because it is at equal distance from previous prime (55660051) and next prime (55660081).

It is a zygodrome in base 10.

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 31 ways as a sum of consecutive naturals, for example, 424821 + ... + 424951.

It is an arithmetic number, because the mean of its divisors is an integer number (1710720).

Almost surely, 2^55660066 is an apocalyptic number.

55660066 is a deficient number, since it is larger than the sum of its proper divisors (53826014).

55660066 is a wasteful number, since it uses less digits than its factorization.

55660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 55660066 is about 7460.5674046952. The cubic root of 55660066 is about 381.8105334928.

The spelling of 55660066 in words is "fifty-five million, six hundred sixty thousand, sixty-six".