670911909 has 16 divisors (see below), whose sum is σ = 934447104. Its totient is φ = 427367600.

The previous prime is 670911881. The next prime is 670911931. The reversal of 670911909 is 909119076.

It is not a de Polignac number, because 670911909 - 2²⁴ = 654134693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670911959) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 66424 + ... + 75854.

It is an arithmetic number, because the mean of its divisors is an integer number (58402944).

Almost surely, 2^670911909 is an apocalyptic number.

670911909 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

670911909 is a deficient number, since it is larger than the sum of its proper divisors (263535195).

670911909 is a wasteful number, since it uses less digits than its factorization.

670911909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 670911909 is about 25901.9672804982. The cubic root of 670911909 is about 875.4308230521.

The spelling of 670911909 in words is "six hundred seventy million, nine hundred eleven thousand, nine hundred nine".