2478766669 has 2 divisors, whose sum is σ = 2478766670. Its totient is φ = 2478766668.

The previous prime is 2478766637. The next prime is 2478766729. The reversal of 2478766669 is 9666678742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1910564100 + 568202569 = 43710^2 + 23837^2 .

It is a cyclic number.

It is not a de Polignac number, because 2478766669 - 2⁵ = 2478766637 is a prime.

It is a super-2 number, since 2×2478766669² = 12288568398690711122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2478761669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239383334 + 1239383335.

It is an arithmetic number, because the mean of its divisors is an integer number (1239383335).

Almost surely, 2^2478766669 is an apocalyptic number.

It is an amenable number.

2478766669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2478766669 is an equidigital number, since it uses as much as digits as its factorization.

2478766669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 61.

The square root of 2478766669 is about 49787.2139108024. The cubic root of 2478766669 is about 1353.3554698763.

The spelling of 2478766669 in words is "two billion, four hundred seventy-eight million, seven hundred sixty-six thousand, six hundred sixty-nine".