1385142666 has 16 divisors (see below), whose sum is σ = 2770961664. Its totient is φ = 461601504.

The previous prime is 1385142641. The next prime is 1385142667. The reversal of 1385142666 is 6662415831.

It is not an unprimeable number, because it can be changed into a prime (1385142667) 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, 726 + ... + 52638.

It is an arithmetic number, because the mean of its divisors is an integer number (173185104).

Almost surely, 2^1385142666 is an apocalyptic number.

1385142666 is an abundant number, since it is smaller than the sum of its proper divisors (1385818998).

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

1385142666 is a wasteful number, since it uses less digits than its factorization.

1385142666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56365.

The product of its digits is 207360, while the sum is 42.

The square root of 1385142666 is about 37217.5048330755. The cubic root of 1385142666 is about 1114.7175421854.

The spelling of 1385142666 in words is "one billion, three hundred eighty-five million, one hundred forty-two thousand, six hundred sixty-six".