1670257711 has 4 divisors (see below), whose sum is σ = 1724137024. Its totient is φ = 1616378400.

The previous prime is 1670257709. The next prime is 1670257717. The reversal of 1670257711 is 1177520761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1177520761 = 59 ⋅19957979.

It is a cyclic number.

It is not a de Polignac number, because 1670257711 - 2¹ = 1670257709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670257717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26939610 + ... + 26939671.

It is an arithmetic number, because the mean of its divisors is an integer number (431034256).

Almost surely, 2^1670257711 is an apocalyptic number.

1670257711 is a deficient number, since it is larger than the sum of its proper divisors (53879313).

1670257711 is an equidigital number, since it uses as much as digits as its factorization.

1670257711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53879312.

The product of its (nonzero) digits is 20580, while the sum is 37.

The square root of 1670257711 is about 40868.7865124474. The cubic root of 1670257711 is about 1186.4820214204.

The spelling of 1670257711 in words is "one billion, six hundred seventy million, two hundred fifty-seven thousand, seven hundred eleven".