6151666381 has 32 divisors (see below), whose sum is σ = 7427137536. Its totient is φ = 4984200000.

The previous prime is 6151666379. The next prime is 6151666421. The reversal of 6151666381 is 1836661516.

It is a cyclic number.

It is not a de Polignac number, because 6151666381 - 2¹ = 6151666379 is a prime.

It is a super-2 number, since 2×6151666381² = 75685998526251274322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6151666321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2885686 + ... + 2887816.

It is an arithmetic number, because the mean of its divisors is an integer number (232098048).

Almost surely, 2^6151666381 is an apocalyptic number.

It is an amenable number.

6151666381 is a deficient number, since it is larger than the sum of its proper divisors (1275471155).

6151666381 is a wasteful number, since it uses less digits than its factorization.

6151666381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its digits is 155520, while the sum is 43.

The square root of 6151666381 is about 78432.5594444042. The cubic root of 6151666381 is about 1832.3042609970.

The spelling of 6151666381 in words is "six billion, one hundred fifty-one million, six hundred sixty-six thousand, three hundred eighty-one".