1670221607 has 2 divisors, whose sum is σ = 1670221608. Its totient is φ = 1670221606.

The previous prime is 1670221603. The next prime is 1670221639. The reversal of 1670221607 is 7061220761.

It is an a-pointer prime, because the next prime (1670221639) can be obtained adding 1670221607 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670221607 - 2² = 1670221603 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670221603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835110803 + 835110804.

It is an arithmetic number, because the mean of its divisors is an integer number (835110804).

Almost surely, 2^1670221607 is an apocalyptic number.

1670221607 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670221607 is an equidigital number, since it uses as much as digits as its factorization.

1670221607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1670221607 is about 40868.3448037720. The cubic root of 1670221607 is about 1186.4734724292.

The spelling of 1670221607 in words is "one billion, six hundred seventy million, two hundred twenty-one thousand, six hundred seven".