67561395 has 16 divisors (see below), whose sum is σ = 117925632. Its totient is φ = 32756960.

The previous prime is 67561391. The next prime is 67561409. The reversal of 67561395 is 59316576.

It is a happy number.

It is not a de Polignac number, because 67561395 - 2² = 67561391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67561391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204567 + ... + 204896.

It is an arithmetic number, because the mean of its divisors is an integer number (7370352).

Almost surely, 2^67561395 is an apocalyptic number.

67561395 is a deficient number, since it is larger than the sum of its proper divisors (50364237).

67561395 is a wasteful number, since it uses less digits than its factorization.

67561395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409482.

The product of its digits is 170100, while the sum is 42.

The square root of 67561395 is about 8219.5738940653. The cubic root of 67561395 is about 407.2860507624.

The spelling of 67561395 in words is "sixty-seven million, five hundred sixty-one thousand, three hundred ninety-five".