102666677621 has 2 divisors, whose sum is σ = 102666677622. Its totient is φ = 102666677620.

The previous prime is 102666677567. The next prime is 102666677653. The reversal of 102666677621 is 126776666201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99973586596 + 2693091025 = 316186^2 + 51895^2 .

It is a cyclic number.

It is not a de Polignac number, because 102666677621 - 2¹⁸ = 102666415477 is a prime.

It is a super-4 number, since 4×102666677621⁴ (a number of 45 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102666677621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102666677681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51333338810 + 51333338811.

It is an arithmetic number, because the mean of its divisors is an integer number (51333338811).

Almost surely, 2^102666677621 is an apocalyptic number.

It is an amenable number.

102666677621 is a deficient number, since it is larger than the sum of its proper divisors (1).

102666677621 is an equidigital number, since it uses as much as digits as its factorization.

102666677621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 102666677621 in words is "one hundred two billion, six hundred sixty-six million, six hundred seventy-seven thousand, six hundred twenty-one".