7566981 has 8 divisors (see below), whose sum is σ = 10362144. Its totient is φ = 4908240.

The previous prime is 7566973. The next prime is 7566983. The reversal of 7566981 is 1896657.

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

It is not a de Polignac number, because 7566981 - 2³ = 7566973 is a prime.

It is a super-2 number, since 2×7566981² = 114518402908722, which contains 22 as substring.

7566981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7566983) 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 in 7 ways as a sum of consecutive naturals, for example, 33975 + ... + 34196.

It is an arithmetic number, because the mean of its divisors is an integer number (1295268).

Almost surely, 2^7566981 is an apocalyptic number.

It is an amenable number.

7566981 is a deficient number, since it is larger than the sum of its proper divisors (2795163).

7566981 is a wasteful number, since it uses less digits than its factorization.

7566981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68211.

The product of its digits is 90720, while the sum is 42.

The square root of 7566981 is about 2750.8146066211. The cubic root of 7566981 is about 196.3243709095.

The spelling of 7566981 in words is "seven million, five hundred sixty-six thousand, nine hundred eighty-one".