66606255 has 48 divisors (see below), whose sum is σ = 123832800. Its totient is φ = 32999424.

The previous prime is 66606217. The next prime is 66606271. The reversal of 66606255 is 55260666.

It is not a de Polignac number, because 66606255 - 2¹⁴ = 66589871 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62971 + ... + 64019.

It is an arithmetic number, because the mean of its divisors is an integer number (2579850).

Almost surely, 2^66606255 is an apocalyptic number.

66606255 is a deficient number, since it is larger than the sum of its proper divisors (57226545).

66606255 is a wasteful number, since it uses less digits than its factorization.

66606255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 66606255 is about 8161.2655268653. The cubic root of 66606255 is about 405.3576173707.

The spelling of 66606255 in words is "sixty-six million, six hundred six thousand, two hundred fifty-five".