6715630981 has 4 divisors (see below), whose sum is σ = 6715811200. Its totient is φ = 6715450764.

The previous prime is 6715630969. The next prime is 6715630991. The reversal of 6715630981 is 1890365176.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6715630981 - 2¹⁷ = 6715499909 is a prime.

It is a super-2 number, since 2×6715630981² = 90199398945934044722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6715630931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11151 + ... + 116428.

It is an arithmetic number, because the mean of its divisors is an integer number (1678952800).

Almost surely, 2^6715630981 is an apocalyptic number.

It is an amenable number.

6715630981 is a deficient number, since it is larger than the sum of its proper divisors (180219).

6715630981 is a wasteful number, since it uses less digits than its factorization.

6715630981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180218.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 6715630981 is about 81948.9535076562. The cubic root of 6715630981 is about 1886.6685412703.

The spelling of 6715630981 in words is "six billion, seven hundred fifteen million, six hundred thirty thousand, nine hundred eighty-one".