1670740405 has 8 divisors (see below), whose sum is σ = 2033126784. Its totient is φ = 1317766800.

The previous prime is 1670740403. The next prime is 1670740441. The reversal of 1670740405 is 5040470761.

It is a happy number.

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

It is not a de Polignac number, because 1670740405 - 2¹ = 1670740403 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 (1670740403) 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, 2352801 + ... + 2353510.

It is an arithmetic number, because the mean of its divisors is an integer number (254140848).

Almost surely, 2^1670740405 is an apocalyptic number.

It is an amenable number.

1670740405 is a deficient number, since it is larger than the sum of its proper divisors (362386379).

1670740405 is an equidigital number, since it uses as much as digits as its factorization.

1670740405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4706387.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 1670740405 is about 40874.6914973067. The cubic root of 1670740405 is about 1186.5963056989.

The spelling of 1670740405 in words is "one billion, six hundred seventy million, seven hundred forty thousand, four hundred five".