66696604210 has 32 divisors (see below), whose sum is σ = 126440092800. Its totient is φ = 25260986880.

The previous prime is 66696604193. The next prime is 66696604213. The reversal of 66696604210 is 1240669666.

It is not an unprimeable number, because it can be changed into a prime (66696604213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265995 + ... + 451825.

It is an arithmetic number, because the mean of its divisors is an integer number (3951252900).

Almost surely, 2^66696604210 is an apocalyptic number.

66696604210 is a deficient number, since it is larger than the sum of its proper divisors (59743488590).

66696604210 is a wasteful number, since it uses less digits than its factorization.

66696604210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187746.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 66696604210 in words is "sixty-six billion, six hundred ninety-six million, six hundred four thousand, two hundred ten".