7661636 has 12 divisors (see below), whose sum is σ = 14113680. Its totient is φ = 3629160.

The previous prime is 7661603. The next prime is 7661639. The reversal of 7661636 is 6361667.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7661596 and 7661605.

It is not an unprimeable number, because it can be changed into a prime (7661639) 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, 50330 + ... + 50481.

It is an arithmetic number, because the mean of its divisors is an integer number (1176140).

Almost surely, 2^7661636 is an apocalyptic number.

7661636 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

7661636 is a deficient number, since it is larger than the sum of its proper divisors (6452044).

7661636 is a wasteful number, since it uses less digits than its factorization.

7661636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100834 (or 100832 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 7661636 is about 2767.9660402541. The cubic root of 7661636 is about 197.1395851669.

The spelling of 7661636 in words is "seven million, six hundred sixty-one thousand, six hundred thirty-six".