66670370 has 16 divisors (see below), whose sum is σ = 129238200. Its totient is φ = 24616704.

The previous prime is 66670327. The next prime is 66670421. The reversal of 66670370 is 7307666.

It can be written as a sum of positive squares in 4 ways, for example, as 30658369 + 36012001 = 5537^2 + 6001^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66670370.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256295 + ... + 256554.

Almost surely, 2^66670370 is an apocalyptic number.

66670370 is a deficient number, since it is larger than the sum of its proper divisors (62567830).

66670370 is a wasteful number, since it uses less digits than its factorization.

66670370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512869.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 66670370 is about 8165.1925880533. The cubic root of 66670370 is about 405.4876410397.

The spelling of 66670370 in words is "sixty-six million, six hundred seventy thousand, three hundred seventy".