66078487 has 8 divisors (see below), whose sum is σ = 67883904. Its totient is φ = 64285368.

The previous prime is 66078479. The next prime is 66078491. The reversal of 66078487 is 78487066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66078487 - 2³ = 66078479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66078427) 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, 8388 + ... + 14230.

It is an arithmetic number, because the mean of its divisors is an integer number (8485488).

Almost surely, 2^66078487 is an apocalyptic number.

66078487 is a deficient number, since it is larger than the sum of its proper divisors (1805417).

66078487 is a wasteful number, since it uses less digits than its factorization.

66078487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 66078487 is about 8128.8675102993. The cubic root of 66078487 is about 404.2841329495.

The spelling of 66078487 in words is "sixty-six million, seventy-eight thousand, four hundred eighty-seven".