1670647057 has 2 divisors, whose sum is σ = 1670647058. Its totient is φ = 1670647056.

The previous prime is 1670647037. The next prime is 1670647081. The reversal of 1670647057 is 7507460761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1219127056 + 451520001 = 34916^2 + 21249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670647057 is a prime.

It is a super-2 number, since 2×1670647057² = 5582123178125522498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1670647037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835323528 + 835323529.

It is an arithmetic number, because the mean of its divisors is an integer number (835323529).

Almost surely, 2^1670647057 is an apocalyptic number.

It is an amenable number.

1670647057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670647057 is an equidigital number, since it uses as much as digits as its factorization.

1670647057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 1670647057 is about 40873.5496011785. The cubic root of 1670647057 is about 1186.5742060249.

The spelling of 1670647057 in words is "one billion, six hundred seventy million, six hundred forty-seven thousand, fifty-seven".