3664620693 has 6 divisors (see below), whose sum is σ = 5293341014. Its totient is φ = 2443080456.

The previous prime is 3664620679. The next prime is 3664620709. The reversal of 3664620693 is 3960264663.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2222368164 + 1442252529 = 47142^2 + 37977^2 .

It is not a de Polignac number, because 3664620693 - 2¹⁰ = 3664619669 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 (3664620643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203590030 + ... + 203590047.

Almost surely, 2^3664620693 is an apocalyptic number.

It is an amenable number.

3664620693 is a deficient number, since it is larger than the sum of its proper divisors (1628720321).

3664620693 is a wasteful number, since it uses less digits than its factorization.

3664620693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407180083 (or 407180080 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 45.

The square root of 3664620693 is about 60536.1106530639. The cubic root of 3664620693 is about 1541.7348040256.

The spelling of 3664620693 in words is "three billion, six hundred sixty-four million, six hundred twenty thousand, six hundred ninety-three".