67672405 has 4 divisors (see below), whose sum is σ = 81206892. Its totient is φ = 54137920.

The previous prime is 67672391. The next prime is 67672421. The reversal of 67672405 is 50427676.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24940036 + 42732369 = 4994^2 + 6537^2 .

It is not a de Polignac number, because 67672405 - 2⁹ = 67671893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6767236 + ... + 6767245.

It is an arithmetic number, because the mean of its divisors is an integer number (20301723).

Almost surely, 2^67672405 is an apocalyptic number.

It is an amenable number.

67672405 is a deficient number, since it is larger than the sum of its proper divisors (13534487).

67672405 is a wasteful number, since it uses less digits than its factorization.

67672405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13534486.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 67672405 is about 8226.3239056094. The cubic root of 67672405 is about 407.5089990109.

The spelling of 67672405 in words is "sixty-seven million, six hundred seventy-two thousand, four hundred five".