7666990 has 16 divisors (see below), whose sum is σ = 13911552. Its totient is φ = 3042144.

The previous prime is 7666973. The next prime is 7666993. The reversal of 7666990 is 996667.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (869472).

Almost surely, 2^7666990 is an apocalyptic number.

7666990 is a deficient number, since it is larger than the sum of its proper divisors (6244562).

7666990 is a wasteful number, since it uses less digits than its factorization.

7666990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 7666990 is about 2768.9330074958. The cubic root of 7666990 is about 197.1854952734.

The spelling of 7666990 in words is "seven million, six hundred sixty-six thousand, nine hundred ninety".