67561697 has 8 divisors (see below), whose sum is σ = 78670656. Its totient is φ = 56817072.

The previous prime is 67561657. The next prime is 67561721. The reversal of 67561697 is 79616576.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67561697 - 2⁸ = 67561441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67561657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90683 + ... + 91424.

It is an arithmetic number, because the mean of its divisors is an integer number (9833832).

Almost surely, 2^67561697 is an apocalyptic number.

It is an amenable number.

67561697 is a deficient number, since it is larger than the sum of its proper divisors (11108959).

67561697 is a wasteful number, since it uses less digits than its factorization.

67561697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182167.

The product of its digits is 476280, while the sum is 47.

The square root of 67561697 is about 8219.5922648268. The cubic root of 67561697 is about 407.2866576188.

The spelling of 67561697 in words is "sixty-seven million, five hundred sixty-one thousand, six hundred ninety-seven".