7666631 has 8 divisors (see below), whose sum is σ = 8975904. Its totient is φ = 6410880.

The previous prime is 7666621. The next prime is 7666639. The reversal of 7666631 is 1366667.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-7666631 is a prime.

It is a super-2 number, since 2×7666631² = 117554461780322, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7666591 and 7666600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666639) 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, 13070 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (1121988).

Almost surely, 2^7666631 is an apocalyptic number.

7666631 is a deficient number, since it is larger than the sum of its proper divisors (1309273).

7666631 is a wasteful number, since it uses less digits than its factorization.

7666631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26761.

The product of its digits is 27216, while the sum is 35.

The square root of 7666631 is about 2768.8681803221. The cubic root of 7666631 is about 197.1824175468.

The spelling of 7666631 in words is "seven million, six hundred sixty-six thousand, six hundred thirty-one".