685006666530 has 32 divisors (see below), whose sum is σ = 1688448867264. Its totient is φ = 177731459136.

The previous prime is 685006666517. The next prime is 685006666537. The reversal of 685006666530 is 35666600586.

It is not an unprimeable number, because it can be changed into a prime (685006666537) 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, 308560452 + ... + 308562671.

It is an arithmetic number, because the mean of its divisors is an integer number (52764027102).

Almost surely, 2^685006666530 is an apocalyptic number.

685006666530 is an abundant number, since it is smaller than the sum of its proper divisors (1003442200734).

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

685006666530 is a wasteful number, since it uses less digits than its factorization.

685006666530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617123170.

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 685006666530 in words is "six hundred eighty-five billion, six million, six hundred sixty-six thousand, five hundred thirty".