8007661 has 4 divisors (see below), whose sum is σ = 8045824. Its totient is φ = 7969500.

The previous prime is 8007647. The next prime is 8007667. The reversal of 8007661 is 1667008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8007661 - 2¹⁵ = 7974893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8007667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18765 + ... + 19186.

It is an arithmetic number, because the mean of its divisors is an integer number (2011456).

Almost surely, 2^8007661 is an apocalyptic number.

It is an amenable number.

8007661 is a deficient number, since it is larger than the sum of its proper divisors (38163).

8007661 is a wasteful number, since it uses less digits than its factorization.

8007661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38162.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 8007661 is about 2829.7810869394. The cubic root of 8007661 is about 200.0638212987.

It can be divided in two parts, 8007 and 661, that added together give a palindrome (8668).

The spelling of 8007661 in words is "eight million, seven thousand, six hundred sixty-one".