66643206702 has 16 divisors (see below), whose sum is σ = 133291281792. Its totient is φ = 22213590840.

The previous prime is 66643206701. The next prime is 66643206757. The reversal of 66643206702 is 20760234666.

It is a happy number.

66643206702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66643206701) 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, 10924 + ... + 365247.

It is an arithmetic number, because the mean of its divisors is an integer number (8330705112).

Almost surely, 2^66643206702 is an apocalyptic number.

66643206702 is an abundant number, since it is smaller than the sum of its proper divisors (66648075090).

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

66643206702 is a wasteful number, since it uses less digits than its factorization.

66643206702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405703.

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 66643206702 in words is "sixty-six billion, six hundred forty-three million, two hundred six thousand, seven hundred two".