1420660666 has 16 divisors (see below), whose sum is σ = 2264932800. Its totient is φ = 666409248.

The previous prime is 1420660651. The next prime is 1420660667. The reversal of 1420660666 is 6660660241.

It is not an unprimeable number, because it can be changed into a prime (1420660667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177571 + ... + 185398.

It is an arithmetic number, because the mean of its divisors is an integer number (141558300).

Almost surely, 2^1420660666 is an apocalyptic number.

1420660666 is a deficient number, since it is larger than the sum of its proper divisors (844272134).

1420660666 is a wasteful number, since it uses less digits than its factorization.

1420660666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363093.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1420660666 is about 37691.6524710711. The cubic root of 1420660666 is about 1124.1651527396.

The spelling of 1420660666 in words is "one billion, four hundred twenty million, six hundred sixty thousand, six hundred sixty-six".