7640555 has 32 divisors (see below), whose sum is σ = 10499328. Its totient is φ = 5299200.

The previous prime is 7640519. The next prime is 7640579. The reversal of 7640555 is 5550467.

It is a happy number.

It is not a de Polignac number, because 7640555 - 2¹⁶ = 7575019 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125225 + ... + 125285.

It is an arithmetic number, because the mean of its divisors is an integer number (328104).

Almost surely, 2^7640555 is an apocalyptic number.

7640555 is a deficient number, since it is larger than the sum of its proper divisors (2858773).

7640555 is a wasteful number, since it uses less digits than its factorization.

7640555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 7640555 is about 2764.1553863703. The cubic root of 7640555 is about 196.9586091505.

The spelling of 7640555 in words is "seven million, six hundred forty thousand, five hundred fifty-five".