1657070671 has 2 divisors, whose sum is σ = 1657070672. Its totient is φ = 1657070670.

The previous prime is 1657070669. The next prime is 1657070677. The reversal of 1657070671 is 1760707561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1657070671 - 2¹ = 1657070669 is a prime.

Together with 1657070669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1657070677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828535335 + 828535336.

It is an arithmetic number, because the mean of its divisors is an integer number (828535336).

Almost surely, 2^1657070671 is an apocalyptic number.

1657070671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657070671 is an equidigital number, since it uses as much as digits as its factorization.

1657070671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 1657070671 is about 40707.1329253240. The cubic root of 1657070671 is about 1183.3512582266.

The spelling of 1657070671 in words is "one billion, six hundred fifty-seven million, seventy thousand, six hundred seventy-one".