1339666686 has 12 divisors (see below), whose sum is σ = 2902611192. Its totient is φ = 446555556.

The previous prime is 1339666681. The next prime is 1339666747. The reversal of 1339666686 is 6866669331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339666681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37212946 + ... + 37212981.

It is an arithmetic number, because the mean of its divisors is an integer number (241884266).

Almost surely, 2^1339666686 is an apocalyptic number.

1339666686 is an abundant number, since it is smaller than the sum of its proper divisors (1562944506).

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

1339666686 is a wasteful number, since it uses less digits than its factorization.

1339666686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74425935 (or 74425932 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 1339666686 is about 36601.4574299986. The cubic root of 1339666686 is about 1102.3823534360.

The spelling of 1339666686 in words is "one billion, three hundred thirty-nine million, six hundred sixty-six thousand, six hundred eighty-six".