66055711 has 4 divisors (see below), whose sum is σ = 66798000. Its totient is φ = 65313424.

The previous prime is 66055687. The next prime is 66055753. The reversal of 66055711 is 11755066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66055711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66055211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371011 + ... + 371188.

It is an arithmetic number, because the mean of its divisors is an integer number (16699500).

Almost surely, 2^66055711 is an apocalyptic number.

66055711 is a deficient number, since it is larger than the sum of its proper divisors (742289).

66055711 is an equidigital number, since it uses as much as digits as its factorization.

66055711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742288.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 66055711 is about 8127.4664564057. The cubic root of 66055711 is about 404.2376779232.

It can be divided in two parts, 66055 and 711, that added together give a palindrome (66766).

The spelling of 66055711 in words is "sixty-six million, fifty-five thousand, seven hundred eleven".