1670681338 has 4 divisors (see below), whose sum is σ = 2506022010. Its totient is φ = 835340668.

The previous prime is 1670681323. The next prime is 1670681339. The reversal of 1670681338 is 8331860761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 923369769 + 747311569 = 30387^2 + 27337^2 .

It is a super-2 number, since 2×1670681338² = 5582352266282940488, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1670681294 and 1670681303.

It is not an unprimeable number, because it can be changed into a prime (1670681339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417670333 + ... + 417670336.

Almost surely, 2^1670681338 is an apocalyptic number.

1670681338 is a deficient number, since it is larger than the sum of its proper divisors (835340672).

1670681338 is an equidigital number, since it uses as much as digits as its factorization.

1670681338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835340671.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1670681338 is about 40873.9689533571. The cubic root of 1670681338 is about 1186.5823219765.

The spelling of 1670681338 in words is "one billion, six hundred seventy million, six hundred eighty-one thousand, three hundred thirty-eight".