7907661 has 6 divisors (see below), whose sum is σ = 11422190. Its totient is φ = 5271768.

The previous prime is 7907651. The next prime is 7907671. The reversal of 7907661 is 1667097.

It is an interprime number because it is at equal distance from previous prime (7907651) and next prime (7907671).

It can be written as a sum of positive squares in only one way, i.e., 7322436 + 585225 = 2706^2 + 765^2 .

It is not a de Polignac number, because 7907661 - 2⁶ = 7907597 is a prime.

It is a super-2 number, since 2×7907661² = 125062204981842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7907651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 439306 + ... + 439323.

Almost surely, 2^7907661 is an apocalyptic number.

It is an amenable number.

7907661 is a deficient number, since it is larger than the sum of its proper divisors (3514529).

7907661 is a wasteful number, since it uses less digits than its factorization.

7907661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878635 (or 878632 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 7907661 is about 2812.0563650112. The cubic root of 7907661 is about 199.2275286143.

The spelling of 7907661 in words is "seven million, nine hundred seven thousand, six hundred sixty-one".