75639667 has 2 divisors, whose sum is σ = 75639668. Its totient is φ = 75639666.

The previous prime is 75639653. The next prime is 75639673. The reversal of 75639667 is 76693657.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75639667 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75639667.

It is not a weakly prime, because it can be changed into another prime (75639167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37819833 + 37819834.

It is an arithmetic number, because the mean of its divisors is an integer number (37819834).

Almost surely, 2^75639667 is an apocalyptic number.

75639667 is a deficient number, since it is larger than the sum of its proper divisors (1).

75639667 is an equidigital number, since it uses as much as digits as its factorization.

75639667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 49.

The square root of 75639667 is about 8697.1068177872. The cubic root of 75639667 is about 422.9118647496.

The spelling of 75639667 in words is "seventy-five million, six hundred thirty-nine thousand, six hundred sixty-seven".