825666670 has 16 divisors (see below), whose sum is σ = 1489311360. Its totient is φ = 329575264.

The previous prime is 825666637. The next prime is 825666689. The reversal of 825666670 is 76666528.

It is a self number, because there is not a number n which added to its sum of digits gives 825666670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81397 + ... + 90976.

It is an arithmetic number, because the mean of its divisors is an integer number (93081960).

Almost surely, 2^825666670 is an apocalyptic number.

825666670 is a deficient number, since it is larger than the sum of its proper divisors (663644690).

825666670 is a wasteful number, since it uses less digits than its factorization.

825666670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172859.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 825666670 is about 28734.4161242229. The cubic root of 825666670 is about 938.1412908883.

The spelling of 825666670 in words is "eight hundred twenty-five million, six hundred sixty-six thousand, six hundred seventy".