100661669 has 2 divisors, whose sum is σ = 100661670. Its totient is φ = 100661668.

The previous prime is 100661629. The next prime is 100661711. The reversal of 100661669 is 966166001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90820900 + 9840769 = 9530^2 + 3137^2 .

It is a cyclic number.

It is not a de Polignac number, because 100661669 - 2⁸ = 100661413 is a prime.

It is a super-2 number, since 2×100661669² = 20265543211731122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100661629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50330834 + 50330835.

It is an arithmetic number, because the mean of its divisors is an integer number (50330835).

Almost surely, 2^100661669 is an apocalyptic number.

It is an amenable number.

100661669 is a deficient number, since it is larger than the sum of its proper divisors (1).

100661669 is an equidigital number, since it uses as much as digits as its factorization.

100661669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 100661669 is about 10033.0289045731. The cubic root of 100661669 is about 465.1803655334.

The spelling of 100661669 in words is "one hundred million, six hundred sixty-one thousand, six hundred sixty-nine".