54699966621077 has 2 divisors, whose sum is σ = 54699966621078. Its totient is φ = 54699966621076.

The previous prime is 54699966621029. The next prime is 54699966621121. The reversal of 54699966621077 is 77012666999645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48201999730756 + 6497966890321 = 6942766^2 + 2549111^2 .

It is a cyclic number.

It is not a de Polignac number, because 54699966621077 - 2¹⁴ = 54699966604693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54699966620989 and 54699966621007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54699966627077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27349983310538 + 27349983310539.

It is an arithmetic number, because the mean of its divisors is an integer number (27349983310539).

Almost surely, 2^{54699966621077} is an apocalyptic number.

It is an amenable number.

54699966621077 is a deficient number, since it is larger than the sum of its proper divisors (1).

54699966621077 is an equidigital number, since it uses as much as digits as its factorization.

54699966621077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1851776640, while the sum is 77.

The spelling of 54699966621077 in words is "fifty-four trillion, six hundred ninety-nine billion, nine hundred sixty-six million, six hundred twenty-one thousand, seventy-seven".