7061661 has 10 divisors (see below), whose sum is σ = 10549022. Its totient is φ = 4707720.

The previous prime is 7061657. The next prime is 7061671. The reversal of 7061661 is 1661607.

7061661 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6859161 + 202500 = 2619^2 + 450^2 .

It is not a de Polignac number, because 7061661 - 2² = 7061657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7061641) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43510 + ... + 43671.

Almost surely, 2^7061661 is an apocalyptic number.

It is an amenable number.

7061661 is a deficient number, since it is larger than the sum of its proper divisors (3487361).

7061661 is an equidigital number, since it uses as much as digits as its factorization.

7061661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87193 (or 87184 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 7061661 is about 2657.3785955336. The cubic root of 7061661 is about 191.8531592098.

The spelling of 7061661 in words is "seven million, sixty-one thousand, six hundred sixty-one".