26610661477 has 2 divisors, whose sum is σ = 26610661478. Its totient is φ = 26610661476.

The previous prime is 26610661421. The next prime is 26610661523. The reversal of 26610661477 is 77416601662.

It is an a-pointer prime, because the next prime (26610661523) can be obtained adding 26610661477 to its sum of digits (46).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26098725601 + 511935876 = 161551^2 + 22626^2 .

It is a cyclic number.

It is not a de Polignac number, because 26610661477 - 2²³ = 26602272869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26610661277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13305330738 + 13305330739.

It is an arithmetic number, because the mean of its divisors is an integer number (13305330739).

Almost surely, 2^26610661477 is an apocalyptic number.

It is an amenable number.

26610661477 is a deficient number, since it is larger than the sum of its proper divisors (1).

26610661477 is an equidigital number, since it uses as much as digits as its factorization.

26610661477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The spelling of 26610661477 in words is "twenty-six billion, six hundred ten million, six hundred sixty-one thousand, four hundred seventy-seven".