3666735891 has 64 divisors (see below), whose sum is σ = 6706022400. Its totient is φ = 1928251008.

The previous prime is 3666735889. The next prime is 3666735913. The reversal of 3666735891 is 1985376663.

It is not a de Polignac number, because 3666735891 - 2¹ = 3666735889 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3666735811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 879985 + ... + 884141.

It is an arithmetic number, because the mean of its divisors is an integer number (104781600).

Almost surely, 2^3666735891 is an apocalyptic number.

3666735891 is a deficient number, since it is larger than the sum of its proper divisors (3039286509).

3666735891 is a wasteful number, since it uses less digits than its factorization.

3666735891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545 (or 4539 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 3666735891 is about 60553.5786803720. The cubic root of 3666735891 is about 1542.0313737958.

The spelling of 3666735891 in words is "three billion, six hundred sixty-six million, seven hundred thirty-five thousand, eight hundred ninety-one".