74766661477 has 2 divisors, whose sum is σ = 74766661478. Its totient is φ = 74766661476.

The previous prime is 74766661471. The next prime is 74766661481. The reversal of 74766661477 is 77416666747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71438063841 + 3328597636 = 267279^2 + 57694^2 .

It is a cyclic number.

It is not a de Polignac number, because 74766661477 - 2¹⁵ = 74766628709 is a prime.

It is a super-3 number, since 3×74766661477³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74766661471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37383330738 + 37383330739.

It is an arithmetic number, because the mean of its divisors is an integer number (37383330739).

Almost surely, 2^74766661477 is an apocalyptic number.

It is an amenable number.

74766661477 is a deficient number, since it is larger than the sum of its proper divisors (1).

74766661477 is an equidigital number, since it uses as much as digits as its factorization.

74766661477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49787136, while the sum is 61.

The spelling of 74766661477 in words is "seventy-four billion, seven hundred sixty-six million, six hundred sixty-one thousand, four hundred seventy-seven".