66210146666 has 16 divisors (see below), whose sum is σ = 101775744000. Its totient is φ = 32285505120.

The previous prime is 66210146663. The next prime is 66210146669. The reversal of 66210146666 is 66664101266.

It is an interprime number because it is at equal distance from previous prime (66210146663) and next prime (66210146669).

It is not an unprimeable number, because it can be changed into a prime (66210146663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70085 + ... + 370583.

It is an arithmetic number, because the mean of its divisors is an integer number (6360984000).

Almost surely, 2^66210146666 is an apocalyptic number.

66210146666 is a deficient number, since it is larger than the sum of its proper divisors (35565597334).

66210146666 is a wasteful number, since it uses less digits than its factorization.

66210146666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303229.

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 66210146666 in words is "sixty-six billion, two hundred ten million, one hundred forty-six thousand, six hundred sixty-six".