3666139702 has 4 divisors (see below), whose sum is σ = 5499209556. Its totient is φ = 1833069850.

The previous prime is 3666139621. The next prime is 3666139703. The reversal of 3666139702 is 2079316663.

3666139702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2079316663 = 773 ⋅2689931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666139703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 916534924 + ... + 916534927.

It is an arithmetic number, because the mean of its divisors is an integer number (1374802389).

Almost surely, 2^3666139702 is an apocalyptic number.

3666139702 is a deficient number, since it is larger than the sum of its proper divisors (1833069854).

3666139702 is a wasteful number, since it uses less digits than its factorization.

3666139702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833069853.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 3666139702 is about 60548.6556580739. The cubic root of 3666139702 is about 1541.9477942852.

The spelling of 3666139702 in words is "three billion, six hundred sixty-six million, one hundred thirty-nine thousand, seven hundred two".