7660638 has 12 divisors (see below), whose sum is σ = 16598088. Its totient is φ = 2553540.

The previous prime is 7660621. The next prime is 7660643. The reversal of 7660638 is 8360667.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 212778 + ... + 212813.

It is an arithmetic number, because the mean of its divisors is an integer number (1383174).

Almost surely, 2^7660638 is an apocalyptic number.

7660638 is an abundant number, since it is smaller than the sum of its proper divisors (8937450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7660638 is a wasteful number, since it uses less digits than its factorization.

7660638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425599 (or 425596 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 7660638 is about 2767.7857576048. The cubic root of 7660638 is about 197.1310250348.

Adding to 7660638 its product of nonzero digits (36288), we get a triangular number (7696926 = T₃₉₂₃).

The spelling of 7660638 in words is "seven million, six hundred sixty thousand, six hundred thirty-eight".