7666742 has 4 divisors (see below), whose sum is σ = 11500116. Its totient is φ = 3833370.

The previous prime is 7666741. The next prime is 7666787. The reversal of 7666742 is 2476667.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 7666696 and 7666705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1916684 + ... + 1916687.

It is an arithmetic number, because the mean of its divisors is an integer number (2875029).

Almost surely, 2^7666742 is an apocalyptic number.

7666742 is a deficient number, since it is larger than the sum of its proper divisors (3833374).

7666742 is a wasteful number, since it uses less digits than its factorization.

7666742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833373.

The product of its digits is 84672, while the sum is 38.

The square root of 7666742 is about 2768.8882245407. Note that the first 3 decimals coincide. The cubic root of 7666742 is about 197.1833691661.

The spelling of 7666742 in words is "seven million, six hundred sixty-six thousand, seven hundred forty-two".