4666278264649 has 9 divisors (see below), whose sum is σ = 4687240905333. Its totient is φ = 4645408987872.

The previous prime is 4666278264547. The next prime is 4666278264679. The reversal of 4666278264649 is 9464628726664.

The square root of 4666278264649 is 2160157.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2032577719225 + 2633700545424 = 1425685^2 + 1622868^2 .

It is not a de Polignac number, because 4666278264649 - 2¹¹ = 4666278262601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4666278264679) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 494671237 + ... + 494680669.

It is an arithmetic number, because the mean of its divisors is an integer number (520804545037).

Almost surely, 2^{4666278264649} is an apocalyptic number.

4666278264649 is the 2160157-th square number.

4666278264649 is the 1080079-th centered octagonal number.

It is an amenable number.

4666278264649 is a deficient number, since it is larger than the sum of its proper divisors (20962640684).

4666278264649 is an frugal number, since it uses more digits than its factorization.

4666278264649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19324 (or 9662 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 70.

The spelling of 4666278264649 in words is "four trillion, six hundred sixty-six billion, two hundred seventy-eight million, two hundred sixty-four thousand, six hundred forty-nine".