3661023311661 has 16 divisors (see below), whose sum is σ = 5010509449728. Its totient is φ = 2376901992000.

The previous prime is 3661023311591. The next prime is 3661023311663. The reversal of 3661023311661 is 1661133201663.

It is not a de Polignac number, because 3661023311661 - 2¹⁴ = 3661023295277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661023311663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99019101 + ... + 99056066.

It is an arithmetic number, because the mean of its divisors is an integer number (313156840608).

Almost surely, 2^{3661023311661} is an apocalyptic number.

It is an amenable number.

3661023311661 is a deficient number, since it is larger than the sum of its proper divisors (1349486138067).

3661023311661 is a wasteful number, since it uses less digits than its factorization.

3661023311661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198075332.

The product of its (nonzero) digits is 69984, while the sum is 39.

It can be divided in two parts, 366102 and 3311661, that added together give a palindrome (3677763).

The spelling of 3661023311661 in words is "three trillion, six hundred sixty-one billion, twenty-three million, three hundred eleven thousand, six hundred sixty-one".