67780136 has 32 divisors (see below), whose sum is σ = 131738880. Its totient is φ = 32659200.

The previous prime is 67780121. The next prime is 67780159. The reversal of 67780136 is 63108776.

It is a self number, because there is not a number n which added to its sum of digits gives 67780136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83171 + ... + 83981.

It is an arithmetic number, because the mean of its divisors is an integer number (4116840).

Almost surely, 2^67780136 is an apocalyptic number.

It is an amenable number.

67780136 is a deficient number, since it is larger than the sum of its proper divisors (63958744).

67780136 is a wasteful number, since it uses less digits than its factorization.

67780136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 67780136 is about 8232.8692446801. The cubic root of 67780136 is about 407.7251288416.

The spelling of 67780136 in words is "sixty-seven million, seven hundred eighty thousand, one hundred thirty-six".