3701666687 has 4 divisors (see below), whose sum is σ = 3703744560. Its totient is φ = 3699588816.

The previous prime is 3701666681. The next prime is 3701666701. The reversal of 3701666687 is 7866661073.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3701666687 - 2⁶ = 3701666623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3701666681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036262 + ... + 1039827.

It is an arithmetic number, because the mean of its divisors is an integer number (925936140).

Almost surely, 2^3701666687 is an apocalyptic number.

3701666687 is a deficient number, since it is larger than the sum of its proper divisors (2077873).

3701666687 is a wasteful number, since it uses less digits than its factorization.

3701666687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077872.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 3701666687 is about 60841.3238432564. The cubic root of 3701666687 is about 1546.9125760335.

The spelling of 3701666687 in words is "three billion, seven hundred one million, six hundred sixty-six thousand, six hundred eighty-seven".