7039661 has 4 divisors (see below), whose sum is σ = 7050300. Its totient is φ = 7029024.

The previous prime is 7039607. The next prime is 7039667. The reversal of 7039661 is 1669307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1669307 = 107 ⋅15601.

It can be written as a sum of positive squares in 2 ways, for example, as 1188100 + 5851561 = 1090^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 7039661 - 2¹⁸ = 6777517 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 (7039667) 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, 4256 + ... + 5673.

It is an arithmetic number, because the mean of its divisors is an integer number (1762575).

Almost surely, 2^7039661 is an apocalyptic number.

It is an amenable number.

7039661 is a deficient number, since it is larger than the sum of its proper divisors (10639).

7039661 is an equidigital number, since it uses as much as digits as its factorization.

7039661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 7039661 is about 2653.2359487991. The cubic root of 7039661 is about 191.6537179238.

The spelling of 7039661 in words is "seven million, thirty-nine thousand, six hundred sixty-one".