67676421 has 8 divisors (see below), whose sum is σ = 90370080. Its totient is φ = 45050192.

The previous prime is 67676417. The next prime is 67676429. The reversal of 67676421 is 12467676.

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

It is a cyclic number.

It is not a de Polignac number, because 67676421 - 2² = 67676417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67676421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67676429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14466 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (11296260).

Almost surely, 2^67676421 is an apocalyptic number.

It is an amenable number.

67676421 is a deficient number, since it is larger than the sum of its proper divisors (22693659).

67676421 is a wasteful number, since it uses less digits than its factorization.

67676421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33715.

The product of its digits is 84672, while the sum is 39.

The square root of 67676421 is about 8226.5679964369. The cubic root of 67676421 is about 407.5170600207.

The spelling of 67676421 in words is "sixty-seven million, six hundred seventy-six thousand, four hundred twenty-one".