66087387 has 8 divisors (see below), whose sum is σ = 97907280. Its totient is φ = 44058240.

The previous prime is 66087383. The next prime is 66087391. The reversal of 66087387 is 78378066.

66087387 is a `hidden beast` number, since 6 + 608 + 7 + 38 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (66087383) and next prime (66087391).

It is not a de Polignac number, because 66087387 - 2² = 66087383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66087383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223814 + ... + 1223867.

It is an arithmetic number, because the mean of its divisors is an integer number (12238410).

Almost surely, 2^66087387 is an apocalyptic number.

66087387 is a deficient number, since it is larger than the sum of its proper divisors (31819893).

66087387 is a wasteful number, since it uses less digits than its factorization.

66087387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447690 (or 2447684 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 66087387 is about 8129.4149235969. The cubic root of 66087387 is about 404.3022829174.

The spelling of 66087387 in words is "sixty-six million, eighty-seven thousand, three hundred eighty-seven".