1670400345 has 8 divisors (see below), whose sum is σ = 2672640576. Its totient is φ = 890880176.

The previous prime is 1670400343. The next prime is 1670400349. The reversal of 1670400345 is 5430040761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1670400345 - 2¹ = 1670400343 is a prime.

It is a super-2 number, since 2×1670400345² = 5580474625152238050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1670400341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55679997 + ... + 55680026.

It is an arithmetic number, because the mean of its divisors is an integer number (334080072).

Almost surely, 2^1670400345 is an apocalyptic number.

1670400345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1670400345 is a deficient number, since it is larger than the sum of its proper divisors (1002240231).

1670400345 is a wasteful number, since it uses less digits than its factorization.

1670400345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111360031.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1670400345 is about 40870.5314988685. The cubic root of 1670400345 is about 1186.5157942246.

The spelling of 1670400345 in words is "one billion, six hundred seventy million, four hundred thousand, three hundred forty-five".