66671710 has 32 divisors (see below), whose sum is σ = 143119872. Its totient is φ = 21864480.

The previous prime is 66671707. The next prime is 66671723. The reversal of 66671710 is 1717666.

It is a happy number.

It is a congruent number.

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, 19096 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (4472496).

Almost surely, 2^66671710 is an apocalyptic number.

66671710 is an abundant number, since it is smaller than the sum of its proper divisors (76448162).

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

66671710 is a wasteful number, since it uses less digits than its factorization.

66671710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41448.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 66671710 is about 8165.2746432683. The cubic root of 66671710 is about 405.4903576378.

The spelling of 66671710 in words is "sixty-six million, six hundred seventy-one thousand, seven hundred ten".