3665651397 has 8 divisors (see below), whose sum is σ = 4889687040. Its totient is φ = 2442691680.

The previous prime is 3665651393. The next prime is 3665651411. The reversal of 3665651397 is 7931565663.

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

It is not a de Polignac number, because 3665651397 - 2² = 3665651393 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665651393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260997 + ... + 274682.

It is an arithmetic number, because the mean of its divisors is an integer number (611210880).

Almost surely, 2^3665651397 is an apocalyptic number.

It is an amenable number.

3665651397 is a deficient number, since it is larger than the sum of its proper divisors (1224035643).

3665651397 is a wasteful number, since it uses less digits than its factorization.

3665651397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537963.

The product of its digits is 3061800, while the sum is 51.

The square root of 3665651397 is about 60544.6231881907. The cubic root of 3665651397 is about 1541.8793322415.

The spelling of 3665651397 in words is "three billion, six hundred sixty-five million, six hundred fifty-one thousand, three hundred ninety-seven".