67621986 has 16 divisors (see below), whose sum is σ = 150271200. Its totient is φ = 22540644.

The previous prime is 67621973. The next prime is 67621987. The reversal of 67621986 is 68912676.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67621987) 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, 626076 + ... + 626183.

It is an arithmetic number, because the mean of its divisors is an integer number (9391950).

Almost surely, 2^67621986 is an apocalyptic number.

67621986 is an abundant number, since it is smaller than the sum of its proper divisors (82649214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67621986 is a wasteful number, since it uses less digits than its factorization.

67621986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252270 (or 1252264 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 67621986 is about 8223.2588430622. The cubic root of 67621986 is about 407.4077696597.

The spelling of 67621986 in words is "sixty-seven million, six hundred twenty-one thousand, nine hundred eighty-six".