616647667331 has 2 divisors, whose sum is σ = 616647667332. Its totient is φ = 616647667330.

The previous prime is 616647667301. The next prime is 616647667351. The reversal of 616647667331 is 133766746616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616647667331 - 2²⁶ = 616580558467 is a prime.

It is a super-2 number, since 2×616647667331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (616647667301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308323833665 + 308323833666.

It is an arithmetic number, because the mean of its divisors is an integer number (308323833666).

Almost surely, 2^616647667331 is an apocalyptic number.

616647667331 is a deficient number, since it is larger than the sum of its proper divisors (1).

616647667331 is an equidigital number, since it uses as much as digits as its factorization.

616647667331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 56.

The spelling of 616647667331 in words is "six hundred sixteen billion, six hundred forty-seven million, six hundred sixty-seven thousand, three hundred thirty-one".