33812201661 has 16 divisors (see below), whose sum is σ = 51527244288. Its totient is φ = 19319799600.

The previous prime is 33812201641. The next prime is 33812201669. The reversal of 33812201661 is 16610221833.

It is not a de Polignac number, because 33812201661 - 2⁶ = 33812201597 is a prime.

It is a super-2 number, since 2×33812201661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33812201669) 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, 264546 + ... + 370956.

It is an arithmetic number, because the mean of its divisors is an integer number (3220452768).

Almost surely, 2^33812201661 is an apocalyptic number.

It is an amenable number.

33812201661 is a deficient number, since it is larger than the sum of its proper divisors (17715042627).

33812201661 is a wasteful number, since it uses less digits than its factorization.

33812201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121552.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 33812201661 in words is "thirty-three billion, eight hundred twelve million, two hundred one thousand, six hundred sixty-one".