66664710 has 48 divisors (see below), whose sum is σ = 198091296. Its totient is φ = 15237504.

The previous prime is 66664693. The next prime is 66664733. The reversal of 66664710 is 1746666.

It is a super-3 number, since 3×66664710³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52279 + ... + 53538.

It is an arithmetic number, because the mean of its divisors is an integer number (4126902).

Almost surely, 2^66664710 is an apocalyptic number.

66664710 is an abundant number, since it is smaller than the sum of its proper divisors (131426586).

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

66664710 is a wasteful number, since it uses less digits than its factorization.

66664710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105837 (or 105834 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66664710 is about 8164.8459875248. The cubic root of 66664710 is about 405.4761660521.

The spelling of 66664710 in words is "sixty-six million, six hundred sixty-four thousand, seven hundred ten".