3661794665651 has 8 divisors (see below), whose sum is σ = 3677897754000. Its totient is φ = 3645692557920.

The previous prime is 3661794665609. The next prime is 3661794665681. The reversal of 3661794665651 is 1565664971663.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3661794665651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661794665681) 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, 7821656 + ... + 8276586.

It is an arithmetic number, because the mean of its divisors is an integer number (459737219250).

Almost surely, 2^{3661794665651} is an apocalyptic number.

3661794665651 is a deficient number, since it is larger than the sum of its proper divisors (16103088349).

3661794665651 is a wasteful number, since it uses less digits than its factorization.

3661794665651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490309.

The product of its digits is 146966400, while the sum is 65.

The spelling of 3661794665651 in words is "three trillion, six hundred sixty-one billion, seven hundred ninety-four million, six hundred sixty-five thousand, six hundred fifty-one".