67564951 has 2 divisors, whose sum is σ = 67564952. Its totient is φ = 67564950.

The previous prime is 67564927. The next prime is 67564979. The reversal of 67564951 is 15946576.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67564951 - 2¹⁷ = 67433879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67564898 and 67564907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67564451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33782475 + 33782476.

It is an arithmetic number, because the mean of its divisors is an integer number (33782476).

Almost surely, 2^67564951 is an apocalyptic number.

67564951 is a deficient number, since it is larger than the sum of its proper divisors (1).

67564951 is an equidigital number, since it uses as much as digits as its factorization.

67564951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 43.

The square root of 67564951 is about 8219.7902041354. The cubic root of 67564951 is about 407.2931962819.

The spelling of 67564951 in words is "sixty-seven million, five hundred sixty-four thousand, nine hundred fifty-one".