670640511 has 16 divisors (see below), whose sum is σ = 954512640. Its totient is φ = 417594240.

The previous prime is 670640471. The next prime is 670640539. The reversal of 670640511 is 115046076.

It is not a de Polignac number, because 670640511 - 2⁹ = 670639999 is a prime.

It is a super-2 number, since 2×670640511² = 899517389988682242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670640591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78810 + ... + 86903.

It is an arithmetic number, because the mean of its divisors is an integer number (59657040).

Almost surely, 2^670640511 is an apocalyptic number.

670640511 is a deficient number, since it is larger than the sum of its proper divisors (283872129).

670640511 is a wasteful number, since it uses less digits than its factorization.

670640511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165806.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 670640511 is about 25896.7278048791. The cubic root of 670640511 is about 875.3127637285.

Adding to 670640511 its reverse (115046076), we get a palindrome (785686587).

The spelling of 670640511 in words is "six hundred seventy million, six hundred forty thousand, five hundred eleven".