67669966 has 48 divisors (see below), whose sum is σ = 129177504. Its totient is φ = 26013312.

The previous prime is 67669949. The next prime is 67669997. The reversal of 67669966 is 66996676.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87156 + ... + 87928.

It is an arithmetic number, because the mean of its divisors is an integer number (2691198).

Almost surely, 2^67669966 is an apocalyptic number.

67669966 is a deficient number, since it is larger than the sum of its proper divisors (61507538).

67669966 is a wasteful number, since it uses less digits than its factorization.

67669966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 832 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 55.

The square root of 67669966 is about 8226.1756606579. The cubic root of 67669966 is about 407.5041032369.

It can be divided in two parts, 67669 and 966, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 67669966 in words is "sixty-seven million, six hundred sixty-nine thousand, nine hundred sixty-six".