670121065800 has 72 divisors (see below), whose sum is σ = 2250489918690. Its totient is φ = 178698950400.

The previous prime is 670121065777. The next prime is 670121065897. The reversal of 670121065800 is 8560121076.

670121065800 is a `hidden beast` number, since 6 + 70 + 1 + 2 + 1 + 0 + 6 + 580 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 505410090084 + 164710975716 = 710922^2 + 405846^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 186142941 + ... + 186146540.

Almost surely, 2^670121065800 is an apocalyptic number.

670121065800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

670121065800 is an abundant number, since it is smaller than the sum of its proper divisors (1580368852890).

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

670121065800 is a wasteful number, since it uses less digits than its factorization.

670121065800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372289503 (or 372289491 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 670121065800 its reverse (8560121076), we get a palindrome (678681186876).

The spelling of 670121065800 in words is "six hundred seventy billion, one hundred twenty-one million, sixty-five thousand, eight hundred".