67649860 has 12 divisors (see below), whose sum is σ = 142064748. Its totient is φ = 27059936.

The previous prime is 67649849. The next prime is 67649867. The reversal of 67649860 is 6894676.

It can be written as a sum of positive squares in 2 ways, for example, as 14884164 + 52765696 = 3858^2 + 7264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67649860.

It is not an unprimeable number, because it can be changed into a prime (67649867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691227 + ... + 1691266.

It is an arithmetic number, because the mean of its divisors is an integer number (11838729).

Almost surely, 2^67649860 is an apocalyptic number.

It is an amenable number.

67649860 is an abundant number, since it is smaller than the sum of its proper divisors (74414888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67649860 is a wasteful number, since it uses less digits than its factorization.

67649860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382502 (or 3382500 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 67649860 is about 8224.9534953093. The cubic root of 67649860 is about 407.4637402341.

The spelling of 67649860 in words is "sixty-seven million, six hundred forty-nine thousand, eight hundred sixty".