3646621766 has 32 divisors (see below), whose sum is σ = 5618688768. Its totient is φ = 1774578400.

The previous prime is 3646621747. The next prime is 3646621793. The reversal of 3646621766 is 6671266463.

It is a self number, because there is not a number n which added to its sum of digits gives 3646621766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4409045 + ... + 4409871.

It is an arithmetic number, because the mean of its divisors is an integer number (175584024).

Almost surely, 2^3646621766 is an apocalyptic number.

3646621766 is a deficient number, since it is larger than the sum of its proper divisors (1972067002).

3646621766 is a wasteful number, since it uses less digits than its factorization.

3646621766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its digits is 1306368, while the sum is 47.

The square root of 3646621766 is about 60387.2649322686. The cubic root of 3646621766 is about 1539.2065635039.

The spelling of 3646621766 in words is "three billion, six hundred forty-six million, six hundred twenty-one thousand, seven hundred sixty-six".