7613661 has 16 divisors (see below), whose sum is σ = 11658240. Its totient is φ = 4371120.

The previous prime is 7613653. The next prime is 7613677. The reversal of 7613661 is 1663167.

7613661 = 624² + 625² + ... + 642².

It is not a de Polignac number, because 7613661 - 2³ = 7613653 is a prime.

It is a Curzon number.

7613661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7613651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5445 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (728640).

Almost surely, 2^7613661 is an apocalyptic number.

It is an amenable number.

7613661 is a deficient number, since it is larger than the sum of its proper divisors (4044579).

7613661 is a wasteful number, since it uses less digits than its factorization.

7613661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12176.

The product of its digits is 4536, while the sum is 30.

The square root of 7613661 is about 2759.2863207721. The cubic root of 7613661 is about 196.7272458532.

The spelling of 7613661 in words is "seven million, six hundred thirteen thousand, six hundred sixty-one".