3866704991 has 8 divisors (see below), whose sum is σ = 4092706800. Its totient is φ = 3642952320.

The previous prime is 3866704973. The next prime is 3866705023. The reversal of 3866704991 is 1994076683.

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

It is a cyclic number.

It is not a de Polignac number, because 3866704991 - 2¹⁸ = 3866442847 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 (3866704921) 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, 558746 + ... + 565623.

It is an arithmetic number, because the mean of its divisors is an integer number (511588350).

Almost surely, 2^3866704991 is an apocalyptic number.

3866704991 is a deficient number, since it is larger than the sum of its proper divisors (226001809).

3866704991 is a wasteful number, since it uses less digits than its factorization.

3866704991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124569.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 3866704991 is about 62182.8351798147. The cubic root of 3866704991 is about 1569.5687607576.

The spelling of 3866704991 in words is "three billion, eight hundred sixty-six million, seven hundred four thousand, nine hundred ninety-one".