67666707 has 12 divisors (see below), whose sum is σ = 100894144. Its totient is φ = 43655760.

The previous prime is 67666691. The next prime is 67666723. The reversal of 67666707 is 70766676.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67666691) and next prime (67666723).

It is not a de Polignac number, because 67666707 - 2⁴ = 67666691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67666727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120988 + ... + 121545.

Almost surely, 2^67666707 is an apocalyptic number.

67666707 is a deficient number, since it is larger than the sum of its proper divisors (33227437).

67666707 is a wasteful number, since it uses less digits than its factorization.

67666707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242570 (or 242567 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The square root of 67666707 is about 8225.9775710854. The cubic root of 67666707 is about 407.4975613037.

The spelling of 67666707 in words is "sixty-seven million, six hundred sixty-six thousand, seven hundred seven".