66311142 has 8 divisors (see below), whose sum is σ = 132622296. Its totient is φ = 22103712.

The previous prime is 66311137. The next prime is 66311143. The reversal of 66311142 is 24111366.

It is a sphenic number, since it is the product of 3 distinct primes.

66311142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311143) 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, 5525923 + ... + 5525934.

It is an arithmetic number, because the mean of its divisors is an integer number (16577787).

Almost surely, 2^66311142 is an apocalyptic number.

66311142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66311142 is a wasteful number, since it uses less digits than its factorization.

66311142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051862.

The product of its digits is 864, while the sum is 24.

The square root of 66311142 is about 8143.1653550692. The cubic root of 66311142 is about 404.7580569881.

The spelling of 66311142 in words is "sixty-six million, three hundred eleven thousand, one hundred forty-two".