4266643375021 has 8 divisors (see below), whose sum is σ = 4337273069624. Its totient is φ = 4196035768320.

The previous prime is 4266643374971. The next prime is 4266643375079. The reversal of 4266643375021 is 1205733466624.

4266643375021 = 1460589² + 1460590².

It can be written as a sum of positive squares in 4 ways, for example, as 3388869796 + 4263254505225 = 58214^2 + 2064765^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4266643375021 - 2¹¹ = 4266643372973 is a prime.

It is a super-2 number, since 2×4266643375021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4266643375321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5132220 + ... + 5905333.

It is an arithmetic number, because the mean of its divisors is an integer number (542159133703).

Almost surely, 2^{4266643375021} is an apocalyptic number.

4266643375021 is the 1460590-th centered square number.

It is an amenable number.

4266643375021 is a deficient number, since it is larger than the sum of its proper divisors (70629694603).

4266643375021 is a wasteful number, since it uses less digits than its factorization.

4266643375021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043951.

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 4266643375021 in words is "four trillion, two hundred sixty-six billion, six hundred forty-three million, three hundred seventy-five thousand, twenty-one".