66711080 has 16 divisors (see below), whose sum is σ = 150100020. Its totient is φ = 26684416.

The previous prime is 66711079. The next prime is 66711083. The reversal of 66711080 is 8011766.

It can be written as a sum of positive squares in 2 ways, for example, as 64866916 + 1844164 = 8054^2 + 1358^2 .

It is not an unprimeable number, because it can be changed into a prime (66711083) 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, 833849 + ... + 833928.

Almost surely, 2^66711080 is an apocalyptic number.

It is an amenable number.

66711080 is an abundant number, since it is smaller than the sum of its proper divisors (83388940).

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

66711080 is a wasteful number, since it uses less digits than its factorization.

66711080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667788 (or 1667784 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 66711080 is about 8167.6851065648. The cubic root of 66711080 is about 405.5701566715.

The spelling of 66711080 in words is "sixty-six million, seven hundred eleven thousand, eighty".