6997487616 has 520 divisors, whose sum is σ = 25118717184. Its totient is φ = 1897758720.

The previous prime is 6997487611. The next prime is 6997487621. The reversal of 6997487616 is 6167847996.

6997487616 is a `hidden beast` number, since 6 + 9 + 9 + 7 + 4 + 8 + 7 + 616 = 666.

It is an interprime number because it is at equal distance from previous prime (6997487611) and next prime (6997487621).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (6997487611) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53415871 + ... + 53416001.

Almost surely, 2^6997487616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6997487616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12559358592).

6997487616 is an abundant number, since it is smaller than the sum of its proper divisors (18121229568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6997487616 is a wasteful number, since it uses less digits than its factorization.

6997487616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 166 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 6997487616 is about 83650.9869397845. The cubic root of 6997487616 is about 1912.7022974014.

The spelling of 6997487616 in words is "six billion, nine hundred ninety-seven million, four hundred eighty-seven thousand, six hundred sixteen".