66087403 has 2 divisors, whose sum is σ = 66087404. Its totient is φ = 66087402.

The previous prime is 66087397. The next prime is 66087409. The reversal of 66087403 is 30478066.

It is a balanced prime because it is at equal distance from previous prime (66087397) and next prime (66087409).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66087403 is a prime.

It is not a weakly prime, because it can be changed into another prime (66087409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33043701 + 33043702.

It is an arithmetic number, because the mean of its divisors is an integer number (33043702).

Almost surely, 2^66087403 is an apocalyptic number.

66087403 is a deficient number, since it is larger than the sum of its proper divisors (1).

66087403 is an equidigital number, since it uses as much as digits as its factorization.

66087403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 66087403 is about 8129.4159076775. The cubic root of 66087403 is about 404.3023155451.

The spelling of 66087403 in words is "sixty-six million, eighty-seven thousand, four hundred three".