7661642 has 16 divisors (see below), whose sum is σ = 11791752. Its totient is φ = 3732480.

The previous prime is 7661639. The next prime is 7661663. The reversal of 7661642 is 2461667.

It can be written as a sum of positive squares in 4 ways, for example, as 6295081 + 1366561 = 2509^2 + 1169^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7661599 and 7661608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13892 + ... + 14432.

Almost surely, 2^7661642 is an apocalyptic number.

7661642 is a deficient number, since it is larger than the sum of its proper divisors (4130110).

7661642 is a wasteful number, since it uses less digits than its factorization.

7661642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 12096, while the sum is 32.

The square root of 7661642 is about 2767.9671240822. The cubic root of 7661642 is about 197.1396366284.

The spelling of 7661642 in words is "seven million, six hundred sixty-one thousand, six hundred forty-two".