66755545 has 16 divisors (see below), whose sum is σ = 84038400. Its totient is φ = 50808384.

The previous prime is 66755539. The next prime is 66755551. The reversal of 66755545 is 54555766.

It is an interprime number because it is at equal distance from previous prime (66755539) and next prime (66755551).

It is a cyclic number.

It is not a de Polignac number, because 66755545 - 2¹³ = 66747353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21427 + ... + 24343.

It is an arithmetic number, because the mean of its divisors is an integer number (5252400).

Almost surely, 2^66755545 is an apocalyptic number.

It is an amenable number.

66755545 is a deficient number, since it is larger than the sum of its proper divisors (17282855).

66755545 is a wasteful number, since it uses less digits than its factorization.

66755545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144.

The product of its digits is 630000, while the sum is 43.

The square root of 66755545 is about 8170.4066606259. The cubic root of 66755545 is about 405.6602450138.

The spelling of 66755545 in words is "sixty-six million, seven hundred fifty-five thousand, five hundred forty-five".