75427021667 has 2 divisors, whose sum is σ = 75427021668. Its totient is φ = 75427021666.

The previous prime is 75427021633. The next prime is 75427021673. The reversal of 75427021667 is 76612072457.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75427021667 is a prime.

It is not a weakly prime, because it can be changed into another prime (75427021567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37713510833 + 37713510834.

It is an arithmetic number, because the mean of its divisors is an integer number (37713510834).

Almost surely, 2^75427021667 is an apocalyptic number.

75427021667 is a deficient number, since it is larger than the sum of its proper divisors (1).

75427021667 is an equidigital number, since it uses as much as digits as its factorization.

75427021667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 75427021667 in words is "seventy-five billion, four hundred twenty-seven million, twenty-one thousand, six hundred sixty-seven".