6617451381 has 8 divisors (see below), whose sum is σ = 8823658944. Its totient is φ = 4411439040.

The previous prime is 6617451361. The next prime is 6617451383. The reversal of 6617451381 is 1831547166.

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-6617451381 is a prime.

It is a super-2 number, since 2×6617451381² = 87581325559797614322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6617451383) 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, 75576 + ... + 137646.

It is an arithmetic number, because the mean of its divisors is an integer number (1102957368).

Almost surely, 2^6617451381 is an apocalyptic number.

It is an amenable number.

6617451381 is a deficient number, since it is larger than the sum of its proper divisors (2206207563).

6617451381 is a wasteful number, since it uses less digits than its factorization.

6617451381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97611.

The product of its digits is 120960, while the sum is 42.

The square root of 6617451381 is about 81347.7189661763. The cubic root of 6617451381 is about 1877.4292784662.

The spelling of 6617451381 in words is "six billion, six hundred seventeen million, four hundred fifty-one thousand, three hundred eighty-one".