10661387 has 8 divisors (see below), whose sum is σ = 11664432. Its totient is φ = 9664000.

The previous prime is 10661383. The next prime is 10661389. The reversal of 10661387 is 78316601.

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

It is a cyclic number.

It is not a de Polignac number, because 10661387 - 2² = 10661383 is a prime.

It is a super-2 number, since 2×10661387² = 227330345527538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661383) 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 in 7 ways as a sum of consecutive naturals, for example, 3203 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (1458054).

Almost surely, 2^10661387 is an apocalyptic number.

10661387 is a deficient number, since it is larger than the sum of its proper divisors (1003045).

10661387 is a wasteful number, since it uses less digits than its factorization.

10661387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 10661387 is about 3265.1779430837. The cubic root of 10661387 is about 220.0921583590.

Adding to 10661387 its reverse (78316601), we get a palindrome (88977988).

The spelling of 10661387 in words is "ten million, six hundred sixty-one thousand, three hundred eighty-seven".