10661401 has 2 divisors, whose sum is σ = 10661402. Its totient is φ = 10661400.

The previous prime is 10661389. The next prime is 10661423. The reversal of 10661401 is 10416601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 389376 = 3205^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 10661401 - 2⁵ = 10661369 is a prime.

It is a super-2 number, since 2×10661401² = 227330942565602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10661461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330700 + 5330701.

It is an arithmetic number, because the mean of its divisors is an integer number (5330701).

Almost surely, 2^10661401 is an apocalyptic number.

It is an amenable number.

10661401 is a deficient number, since it is larger than the sum of its proper divisors (1).

10661401 is an equidigital number, since it uses as much as digits as its factorization.

10661401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 10661401 is about 3265.1800869171. The cubic root of 10661401 is about 220.0922546970.

The spelling of 10661401 in words is "ten million, six hundred sixty-one thousand, four hundred one".