670545725 has 6 divisors (see below), whose sum is σ = 831476730. Its totient is φ = 536436560.

The previous prime is 670545683. The next prime is 670545727. The reversal of 670545725 is 527545076.

It can be written as a sum of positive squares in 3 ways, for example, as 33790969 + 636754756 = 5813^2 + 25234^2 .

It is not a de Polignac number, because 670545725 - 2¹² = 670541629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670545727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13410890 + ... + 13410939.

It is an arithmetic number, because the mean of its divisors is an integer number (138579455).

Almost surely, 2^670545725 is an apocalyptic number.

It is an amenable number.

670545725 is a deficient number, since it is larger than the sum of its proper divisors (160931005).

670545725 is a wasteful number, since it uses less digits than its factorization.

670545725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26821839 (or 26821834 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 41.

The square root of 670545725 is about 25894.8976634394. The cubic root of 670545725 is about 875.2715238971.

The spelling of 670545725 in words is "six hundred seventy million, five hundred forty-five thousand, seven hundred twenty-five".