33666667040021 has 2 divisors, whose sum is σ = 33666667040022. Its totient is φ = 33666667040020.

The previous prime is 33666667040003. The next prime is 33666667040029. The reversal of 33666667040021 is 12004076666633.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455933523025 + 12210733516996 = 4632055^2 + 3494386^2 .

It is a cyclic number.

It is not a de Polignac number, because 33666667040021 - 2²⁶ = 33666599931157 is a prime.

It is a super-2 number, since 2×33666667040021² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33666667040029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16833333520010 + 16833333520011.

It is an arithmetic number, because the mean of its divisors is an integer number (16833333520011).

Almost surely, 2^{33666667040021} is an apocalyptic number.

It is an amenable number.

33666667040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33666667040021 is an equidigital number, since it uses as much as digits as its factorization.

33666667040021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 50.

The spelling of 33666667040021 in words is "thirty-three trillion, six hundred sixty-six billion, six hundred sixty-seven million, forty thousand, twenty-one".