666670422 has 32 divisors (see below), whose sum is σ = 1462616064. Its totient is φ = 200901600.

The previous prime is 666670421. The next prime is 666670429. The reversal of 666670422 is 224076666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666670421) 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, 15958 + ... + 39849.

It is an arithmetic number, because the mean of its divisors is an integer number (45706752).

Almost surely, 2^666670422 is an apocalyptic number.

666670422 is an abundant number, since it is smaller than the sum of its proper divisors (795945642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666670422 is a wasteful number, since it uses less digits than its factorization.

666670422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56004.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 666670422 is about 25819.9616963310. The cubic root of 666670422 is about 873.5821050261.

It can be divided in two parts, 6666704 and 22, that added together give a triangular number (6666726 = T₃₆₅₁).

The spelling of 666670422 in words is "six hundred sixty-six million, six hundred seventy thousand, four hundred twenty-two".