1670722385 has 8 divisors (see below), whose sum is σ = 2034790656. Its totient is φ = 1316628720.

The previous prime is 1670722381. The next prime is 1670722397. The reversal of 1670722385 is 5832270761.

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

It is not a de Polignac number, because 1670722385 - 2² = 1670722381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670722381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2493281 + ... + 2493950.

It is an arithmetic number, because the mean of its divisors is an integer number (254348832).

Almost surely, 2^1670722385 is an apocalyptic number.

It is an amenable number.

1670722385 is a deficient number, since it is larger than the sum of its proper divisors (364068271).

1670722385 is an equidigital number, since it uses as much as digits as its factorization.

1670722385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987303.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 1670722385 is about 40874.4710669141. The cubic root of 1670722385 is about 1186.5920396178.

The spelling of 1670722385 in words is "one billion, six hundred seventy million, seven hundred twenty-two thousand, three hundred eighty-five".