66805933610 has 32 divisors (see below), whose sum is σ = 129771210240. Its totient is φ = 24615286848.

The previous prime is 66805933547. The next prime is 66805933633. The reversal of 66805933610 is 1633950866.

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, 474152 + ... + 598691.

It is an arithmetic number, because the mean of its divisors is an integer number (4055350320).

Almost surely, 2^66805933610 is an apocalyptic number.

66805933610 is a deficient number, since it is larger than the sum of its proper divisors (62965276630).

66805933610 is a wasteful number, since it uses less digits than its factorization.

66805933610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073342.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 66805933610 in words is "sixty-six billion, eight hundred five million, nine hundred thirty-three thousand, six hundred ten".