68670405 has 48 divisors (see below), whose sum is σ = 124590960. Its totient is φ = 34944000.

The previous prime is 68670403. The next prime is 68670461. The reversal of 68670405 is 50407686.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1052676 + 67617729 = 1026^2 + 8223^2 .

It is not a de Polignac number, because 68670405 - 2¹ = 68670403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68670405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68670401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131545 + ... + 132065.

It is an arithmetic number, because the mean of its divisors is an integer number (2595645).

Almost surely, 2^68670405 is an apocalyptic number.

It is an amenable number.

68670405 is a deficient number, since it is larger than the sum of its proper divisors (55920555).

68670405 is a wasteful number, since it uses less digits than its factorization.

68670405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 68670405 is about 8286.7608267646. The cubic root of 68670405 is about 409.5024800039.

The spelling of 68670405 in words is "sixty-eight million, six hundred seventy thousand, four hundred five".