3666701687 has 4 divisors (see below), whose sum is σ = 4000038216. Its totient is φ = 3333365160.

The previous prime is 3666701683. The next prime is 3666701741. The reversal of 3666701687 is 7861076663.

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 3666701687 - 2² = 3666701683 is a prime.

It is a super-2 number, since 2×3666701687² = 26889402522897291938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666701683) 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, 166668248 + ... + 166668269.

It is an arithmetic number, because the mean of its divisors is an integer number (1000009554).

Almost surely, 2^3666701687 is an apocalyptic number.

3666701687 is a deficient number, since it is larger than the sum of its proper divisors (333336529).

3666701687 is a wasteful number, since it uses less digits than its factorization.

3666701687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333336528.

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

The square root of 3666701687 is about 60553.2962521447. The cubic root of 3666701687 is about 1542.0265789949.

The spelling of 3666701687 in words is "three billion, six hundred sixty-six million, seven hundred one thousand, six hundred eighty-seven".