670780449 has 24 divisors (see below), whose sum is σ = 1002290432. Its totient is φ = 431840160.

The previous prime is 670780423. The next prime is 670780463. The reversal of 670780449 is 944087076.

It is not a de Polignac number, because 670780449 - 2⁷ = 670780321 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670780489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143619 + ... + 148215.

Almost surely, 2^670780449 is an apocalyptic number.

It is an amenable number.

670780449 is a deficient number, since it is larger than the sum of its proper divisors (331509983).

670780449 is a wasteful number, since it uses less digits than its factorization.

670780449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157 (or 5154 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 670780449 is about 25899.4295110916. The cubic root of 670780449 is about 875.3736413506.

The spelling of 670780449 in words is "six hundred seventy million, seven hundred eighty thousand, four hundred forty-nine".