106306551661 has 2 divisors, whose sum is σ = 106306551662. Its totient is φ = 106306551660.

The previous prime is 106306551649. The next prime is 106306551671. The reversal of 106306551661 is 166155603601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95299394436 + 11007157225 = 308706^2 + 104915^2 .

It is a cyclic number.

It is not a de Polignac number, because 106306551661 - 2²³ = 106298163053 is a prime.

It is a super-2 number, since 2×106306551661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106306551601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53153275830 + 53153275831.

It is an arithmetic number, because the mean of its divisors is an integer number (53153275831).

Almost surely, 2^106306551661 is an apocalyptic number.

It is an amenable number.

106306551661 is a deficient number, since it is larger than the sum of its proper divisors (1).

106306551661 is an equidigital number, since it uses as much as digits as its factorization.

106306551661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 106306551661 in words is "one hundred six billion, three hundred six million, five hundred fifty-one thousand, six hundred sixty-one".