3665249686 has 24 divisors (see below), whose sum is σ = 6673555440. Its totient is φ = 1502523792.

The previous prime is 3665249681. The next prime is 3665249689. The reversal of 3665249686 is 6869425663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665249681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 810801 + ... + 815308.

It is an arithmetic number, because the mean of its divisors is an integer number (278064810).

Almost surely, 2^3665249686 is an apocalyptic number.

3665249686 is a deficient number, since it is larger than the sum of its proper divisors (3008305754).

3665249686 is a wasteful number, since it uses less digits than its factorization.

3665249686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626148 (or 1626141 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 55.

The square root of 3665249686 is about 60541.3056185610. The cubic root of 3665249686 is about 1541.8230064167.

The spelling of 3665249686 in words is "three billion, six hundred sixty-five million, two hundred forty-nine thousand, six hundred eighty-six".