3766723681 has 8 divisors (see below), whose sum is σ = 4325230784. Its totient is φ = 3213317520.

The previous prime is 3766723663. The next prime is 3766723717. The reversal of 3766723681 is 1863276673.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3766723681 - 2²⁷ = 3632505953 is a prime.

It is a super-2 number, since 2×3766723681² = 28376414578012379522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3766723651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1273650 + ... + 1276603.

It is an arithmetic number, because the mean of its divisors is an integer number (540653848).

Almost surely, 2^3766723681 is an apocalyptic number.

It is an amenable number.

3766723681 is a deficient number, since it is larger than the sum of its proper divisors (558507103).

3766723681 is a wasteful number, since it uses less digits than its factorization.

3766723681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550471.

The product of its digits is 1524096, while the sum is 49.

The square root of 3766723681 is about 61373.6399523444. The cubic root of 3766723681 is about 1555.9223555745.

The spelling of 3766723681 in words is "three billion, seven hundred sixty-six million, seven hundred twenty-three thousand, six hundred eighty-one".