67077421 has 4 divisors (see below), whose sum is σ = 67096512. Its totient is φ = 67058332.

The previous prime is 67077419. The next prime is 67077449. The reversal of 67077421 is 12477076.

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 67077421 - 2¹ = 67077419 is a prime.

It is a super-2 number, since 2×67077421² = 8998760816022482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67071421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2581 + ... + 11866.

It is an arithmetic number, because the mean of its divisors is an integer number (16774128).

Almost surely, 2^67077421 is an apocalyptic number.

It is an amenable number.

67077421 is a deficient number, since it is larger than the sum of its proper divisors (19091).

67077421 is a wasteful number, since it uses less digits than its factorization.

67077421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19090.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 67077421 is about 8190.0806467336. The cubic root of 67077421 is about 406.3111921709.

The spelling of 67077421 in words is "sixty-seven million, seventy-seven thousand, four hundred twenty-one".