67040649 has 32 divisors (see below), whose sum is σ = 107452800. Its totient is φ = 41065920.

The previous prime is 67040629. The next prime is 67040671. The reversal of 67040649 is 94604076.

67040649 is a `hidden beast` number, since 6 + 7 + 0 + 4 + 0 + 649 = 666.

It is not a de Polignac number, because 67040649 - 2⁷ = 67040521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67040609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136294 + ... + 136784.

It is an arithmetic number, because the mean of its divisors is an integer number (3357900).

Almost surely, 2^67040649 is an apocalyptic number.

It is an amenable number.

67040649 is a deficient number, since it is larger than the sum of its proper divisors (40412151).

67040649 is a wasteful number, since it uses less digits than its factorization.

67040649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 896 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 67040649 is about 8187.8354282435. The cubic root of 67040649 is about 406.2369316822.

The spelling of 67040649 in words is "sixty-seven million, forty thousand, six hundred forty-nine".