1666667002 has 64 divisors (see below), whose sum is σ = 3364349184. Its totient is φ = 598026240.

The previous prime is 1666666979. The next prime is 1666667003. The reversal of 1666667002 is 2007666661.

It is not an unprimeable number, because it can be changed into a prime (1666667003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1346728 + ... + 1347964.

It is an arithmetic number, because the mean of its divisors is an integer number (52567956).

Almost surely, 2^1666667002 is an apocalyptic number.

1666667002 is an abundant number, since it is smaller than the sum of its proper divisors (1697682182).

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

1666667002 is a wasteful number, since it uses less digits than its factorization.

1666667002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1666667002 is about 40824.8331533639. The cubic root of 1666667002 is about 1185.6311810130.

The spelling of 1666667002 in words is "one billion, six hundred sixty-six million, six hundred sixty-seven thousand, two".