667780070 has 32 divisors (see below), whose sum is σ = 1236338208. Its totient is φ = 259504128.

The previous prime is 667780039. The next prime is 667780073. The reversal of 667780070 is 70087766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667780073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449549 + ... + 451031.

It is an arithmetic number, because the mean of its divisors is an integer number (38635569).

Almost surely, 2^667780070 is an apocalyptic number.

667780070 is a deficient number, since it is larger than the sum of its proper divisors (568558138).

667780070 is a wasteful number, since it uses less digits than its factorization.

667780070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 667780070 is about 25841.4409427957. The cubic root of 667780070 is about 874.0665179507.

The spelling of 667780070 in words is "six hundred sixty-seven million, seven hundred eighty thousand, seventy".