67661625 has 32 divisors (see below), whose sum is σ = 114311808. Its totient is φ = 35534400.

The previous prime is 67661609. The next prime is 67661639. The reversal of 67661625 is 52616676.

It is not a de Polignac number, because 67661625 - 2⁴ = 67661609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23779 + ... + 26471.

It is an arithmetic number, because the mean of its divisors is an integer number (3572244).

Almost surely, 2^67661625 is an apocalyptic number.

It is an amenable number.

67661625 is a deficient number, since it is larger than the sum of its proper divisors (46650183).

67661625 is a wasteful number, since it uses less digits than its factorization.

67661625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778 (or 2768 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 67661625 is about 8225.6686658289. The cubic root of 67661625 is about 407.4873595637.

It can be divided in two parts, 67661 and 625, that added together give a palindrome (68286).

The spelling of 67661625 in words is "sixty-seven million, six hundred sixty-one thousand, six hundred twenty-five".