10661001 has 8 divisors (see below), whose sum is σ = 15308160. Its totient is φ = 6560592.

The previous prime is 10660999. The next prime is 10661011. The reversal of 10661001 is 10016601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10661001 - 2¹ = 10660999 is a prime.

It is a super-2 number, since 2×10661001² = 227313884644002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10661011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136641 + ... + 136718.

It is an arithmetic number, because the mean of its divisors is an integer number (1913520).

Almost surely, 2^10661001 is an apocalyptic number.

It is an amenable number.

10661001 is a deficient number, since it is larger than the sum of its proper divisors (4647159).

10661001 is a wasteful number, since it uses less digits than its factorization.

10661001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273375.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 10661001 is about 3265.1188339783. The cubic root of 10661001 is about 220.0895021506.

Adding to 10661001 its reverse (10016601), we get a palindrome (20677602).

The spelling of 10661001 in words is "ten million, six hundred sixty-one thousand, one".