67564775 has 12 divisors (see below), whose sum is σ = 86045832. Its totient is φ = 52590240.

The previous prime is 67564769. The next prime is 67564781. The reversal of 67564775 is 57746576.

It is an interprime number because it is at equal distance from previous prime (67564769) and next prime (67564781).

It is not a de Polignac number, because 67564775 - 2¹² = 67560679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35597 + ... + 37446.

It is an arithmetic number, because the mean of its divisors is an integer number (7170486).

Almost surely, 2^67564775 is an apocalyptic number.

67564775 is a deficient number, since it is larger than the sum of its proper divisors (18481057).

67564775 is a wasteful number, since it uses less digits than its factorization.

67564775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73090 (or 73085 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 47.

The square root of 67564775 is about 8219.7794982591. The cubic root of 67564775 is about 407.2928426287.

The spelling of 67564775 in words is "sixty-seven million, five hundred sixty-four thousand, seven hundred seventy-five".