33190778641661 has 2 divisors, whose sum is σ = 33190778641662. Its totient is φ = 33190778641660.

The previous prime is 33190778641637. The next prime is 33190778641687. The reversal of 33190778641661 is 16614687709133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33185595361636 + 5183280025 = 5760694^2 + 71995^2 .

It is a cyclic number.

It is not a de Polignac number, because 33190778641661 - 2³⁴ = 33173598772477 is a prime.

It is a super-2 number, since 2×33190778641661² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33190778641594 and 33190778641603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33190778641061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16595389320830 + 16595389320831.

It is an arithmetic number, because the mean of its divisors is an integer number (16595389320831).

Almost surely, 2^{33190778641661} is an apocalyptic number.

It is an amenable number.

33190778641661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33190778641661 is an equidigital number, since it uses as much as digits as its factorization.

33190778641661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 33190778641661 in words is "thirty-three trillion, one hundred ninety billion, seven hundred seventy-eight million, six hundred forty-one thousand, six hundred sixty-one".