7656981 has 8 divisors (see below), whose sum is σ = 10746720. Its totient is φ = 4835952.

The previous prime is 7656959. The next prime is 7656989. The reversal of 7656981 is 1896567.

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

It is not a de Polignac number, because 7656981 - 2⁵ = 7656949 is a prime.

It is a super-2 number, since 2×7656981² = 117258716068722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7656989) 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, 67110 + ... + 67223.

It is an arithmetic number, because the mean of its divisors is an integer number (1343340).

Almost surely, 2^7656981 is an apocalyptic number.

It is an amenable number.

7656981 is a deficient number, since it is larger than the sum of its proper divisors (3089739).

7656981 is a wasteful number, since it uses less digits than its factorization.

7656981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134355.

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

The square root of 7656981 is about 2767.1250423499. The cubic root of 7656981 is about 197.0996515424.

The spelling of 7656981 in words is "seven million, six hundred fifty-six thousand, nine hundred eighty-one".