1670627641 has 2 divisors, whose sum is σ = 1670627642. Its totient is φ = 1670627640.

The previous prime is 1670627639. The next prime is 1670627669. The reversal of 1670627641 is 1467260761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1077218041 + 593409600 = 32821^2 + 24360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670627641 - 2¹ = 1670627639 is a prime.

Together with 1670627639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1670627594 and 1670627603.

It is not a weakly prime, because it can be changed into another prime (1670627671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835313820 + 835313821.

It is an arithmetic number, because the mean of its divisors is an integer number (835313821).

Almost surely, 2^1670627641 is an apocalyptic number.

It is an amenable number.

1670627641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670627641 is an equidigital number, since it uses as much as digits as its factorization.

1670627641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 1670627641 is about 40873.3120874734. The cubic root of 1670627641 is about 1186.5696092802.

The spelling of 1670627641 in words is "one billion, six hundred seventy million, six hundred twenty-seven thousand, six hundred forty-one".