67025561 has 4 divisors (see below), whose sum is σ = 67044624. Its totient is φ = 67006500.

The previous prime is 67025557. The next prime is 67025573. The reversal of 67025561 is 16552076.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67025561 - 2² = 67025557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67025501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555 + ... + 11856.

It is an arithmetic number, because the mean of its divisors is an integer number (16761156).

Almost surely, 2^67025561 is an apocalyptic number.

It is an amenable number.

67025561 is a deficient number, since it is larger than the sum of its proper divisors (19063).

67025561 is a wasteful number, since it uses less digits than its factorization.

67025561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19062.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 67025561 is about 8186.9140095643. The cubic root of 67025561 is about 406.2064538413.

The spelling of 67025561 in words is "sixty-seven million, twenty-five thousand, five hundred sixty-one".