100661377 has 2 divisors, whose sum is σ = 100661378. Its totient is φ = 100661376.

The previous prime is 100661339. The next prime is 100661381. The reversal of 100661377 is 773166001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83612736 + 17048641 = 9144^2 + 4129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100661377 is a prime.

It is a super-2 number, since 2×100661377² = 20265425639072258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100661177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50330688 + 50330689.

It is an arithmetic number, because the mean of its divisors is an integer number (50330689).

Almost surely, 2^100661377 is an apocalyptic number.

It is an amenable number.

100661377 is a deficient number, since it is larger than the sum of its proper divisors (1).

100661377 is an equidigital number, since it uses as much as digits as its factorization.

100661377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 100661377 is about 10033.0143526260. The cubic root of 100661377 is about 465.1799157336.

The spelling of 100661377 in words is "one hundred million, six hundred sixty-one thousand, three hundred seventy-seven".