67661830 has 8 divisors (see below), whose sum is σ = 121791312. Its totient is φ = 27064728.

The previous prime is 67661813. The next prime is 67661861. The reversal of 67661830 is 3816676.

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

It is a self number, because there is not a number n which added to its sum of digits gives 67661830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3383082 + ... + 3383101.

It is an arithmetic number, because the mean of its divisors is an integer number (15223914).

Almost surely, 2^67661830 is an apocalyptic number.

67661830 is a deficient number, since it is larger than the sum of its proper divisors (54129482).

67661830 is a wasteful number, since it uses less digits than its factorization.

67661830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766190.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 67661830 is about 8225.6811268125. The cubic root of 67661830 is about 407.4877710960.

The spelling of 67661830 in words is "sixty-seven million, six hundred sixty-one thousand, eight hundred thirty".