1396867666 has 32 divisors (see below), whose sum is σ = 2156544000. Its totient is φ = 678431376.

The previous prime is 1396867649. The next prime is 1396867687. The reversal of 1396867666 is 6667686931.

It is a self number, because there is not a number n which added to its sum of digits gives 1396867666.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2799085 + ... + 2799583.

It is an arithmetic number, because the mean of its divisors is an integer number (67392000).

Almost surely, 2^1396867666 is an apocalyptic number.

1396867666 is a deficient number, since it is larger than the sum of its proper divisors (759676334).

1396867666 is a wasteful number, since it uses less digits than its factorization.

1396867666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838.

The product of its digits is 11757312, while the sum is 58.

The square root of 1396867666 is about 37374.6928549252. The cubic root of 1396867666 is about 1117.8540077948.

The spelling of 1396867666 in words is "one billion, three hundred ninety-six million, eight hundred sixty-seven thousand, six hundred sixty-six".