1423065666 has 16 divisors (see below), whose sum is σ = 3104870688. Its totient is φ = 431232000.

The previous prime is 1423065661. The next prime is 1423065673. The reversal of 1423065666 is 6665603241.

It is not an unprimeable number, because it can be changed into a prime (1423065661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10780735 + ... + 10780866.

It is an arithmetic number, because the mean of its divisors is an integer number (194054418).

Almost surely, 2^1423065666 is an apocalyptic number.

1423065666 is an abundant number, since it is smaller than the sum of its proper divisors (1681805022).

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

1423065666 is a wasteful number, since it uses less digits than its factorization.

1423065666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21561617.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1423065666 is about 37723.5425961030. The cubic root of 1423065666 is about 1124.7991518975.

The spelling of 1423065666 in words is "one billion, four hundred twenty-three million, sixty-five thousand, six hundred sixty-six".