670501745 has 4 divisors (see below), whose sum is σ = 804602100. Its totient is φ = 536401392.

The previous prime is 670501729. The next prime is 670501747. The reversal of 670501745 is 547105076.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84474481 + 586027264 = 9191^2 + 24208^2 .

It is a cyclic number.

It is not a de Polignac number, because 670501745 - 2⁴ = 670501729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670501747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67050170 + ... + 67050179.

It is an arithmetic number, because the mean of its divisors is an integer number (201150525).

Almost surely, 2^670501745 is an apocalyptic number.

It is an amenable number.

670501745 is a deficient number, since it is larger than the sum of its proper divisors (134100355).

670501745 is a wasteful number, since it uses less digits than its factorization.

670501745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134100354.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 670501745 is about 25894.0484474715. The cubic root of 670501745 is about 875.2523876017.

The spelling of 670501745 in words is "six hundred seventy million, five hundred one thousand, seven hundred forty-five".