66960387 has 12 divisors (see below), whose sum is σ = 104160784. Its totient is φ = 41206320.

The previous prime is 66960373. The next prime is 66960401. The reversal of 66960387 is 78306966.

It is an interprime number because it is at equal distance from previous prime (66960373) and next prime (66960401).

It is not a de Polignac number, because 66960387 - 2¹² = 66956291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66960317) 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, 286039 + ... + 286272.

Almost surely, 2^66960387 is an apocalyptic number.

66960387 is a deficient number, since it is larger than the sum of its proper divisors (37200397).

66960387 is a wasteful number, since it uses less digits than its factorization.

66960387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572330 (or 572327 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 66960387 is about 8182.9326650046. The cubic root of 66960387 is about 406.0747494359.

The spelling of 66960387 in words is "sixty-six million, nine hundred sixty thousand, three hundred eighty-seven".