15061661 has 8 divisors (see below), whose sum is σ = 15892800. Its totient is φ = 14234400.

The previous prime is 15061649. The next prime is 15061681. The reversal of 15061661 is 16616051.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15061661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15061661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15061601) 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, 10760 + ... + 12078.

It is an arithmetic number, because the mean of its divisors is an integer number (1986600).

Almost surely, 2^15061661 is an apocalyptic number.

It is an amenable number.

15061661 is a deficient number, since it is larger than the sum of its proper divisors (831139).

15061661 is a wasteful number, since it uses less digits than its factorization.

15061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 15061661 is about 3880.9355830779. The cubic root of 15061661 is about 246.9586767785.

The spelling of 15061661 in words is "fifteen million, sixty-one thousand, six hundred sixty-one".