670637045 has 8 divisors (see below), whose sum is σ = 866669496. Its totient is φ = 495239616.

The previous prime is 670637039. The next prime is 670637047. The reversal of 670637045 is 540736076.

It can be written as a sum of positive squares in 4 ways, for example, as 552049 + 670084996 = 743^2 + 25886^2 .

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 670637045 - 2⁸ = 670636789 is a prime.

It is a super-2 number, since 2×670637045² = 899508092252664050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670637047) 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, 5158682 + ... + 5158811.

It is an arithmetic number, because the mean of its divisors is an integer number (108333687).

Almost surely, 2^670637045 is an apocalyptic number.

670637045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

670637045 is a deficient number, since it is larger than the sum of its proper divisors (196032451).

670637045 is a wasteful number, since it uses less digits than its factorization.

670637045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317511.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 670637045 is about 25896.6608851412. The cubic root of 670637045 is about 875.3112557973.

The spelling of 670637045 in words is "six hundred seventy million, six hundred thirty-seven thousand, forty-five".