3731143666 has 4 divisors (see below), whose sum is σ = 5596715502. Its totient is φ = 1865571832.

The previous prime is 3731143643. The next prime is 3731143679. The reversal of 3731143666 is 6663411373.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6663411373 = 1789 ⋅3724657.

It can be written as a sum of positive squares in only one way, i.e., 3375029025 + 356114641 = 58095^2 + 18871^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932785915 + ... + 932785918.

Almost surely, 2^3731143666 is an apocalyptic number.

3731143666 is a deficient number, since it is larger than the sum of its proper divisors (1865571836).

3731143666 is a wasteful number, since it uses less digits than its factorization.

3731143666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865571835.

The product of its digits is 163296, while the sum is 40.

The square root of 3731143666 is about 61083.0882159702. The cubic root of 3731143666 is about 1551.0078309904.

The spelling of 3731143666 in words is "three billion, seven hundred thirty-one million, one hundred forty-three thousand, six hundred sixty-six".