7657906 has 4 divisors (see below), whose sum is σ = 11486862. Its totient is φ = 3828952.

The previous prime is 7657901. The next prime is 7657907. The reversal of 7657906 is 6097567.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 319225 = 2709^2 + 565^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7657901) 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 as a sum of consecutive naturals, namely, 1914475 + ... + 1914478.

Almost surely, 2^7657906 is an apocalyptic number.

7657906 is a deficient number, since it is larger than the sum of its proper divisors (3828956).

7657906 is a wasteful number, since it uses less digits than its factorization.

7657906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828955.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 7657906 is about 2767.2921782855. The cubic root of 7657906 is about 197.1075880836.

The spelling of 7657906 in words is "seven million, six hundred fifty-seven thousand, nine hundred six".