66487455 has 12 divisors (see below), whose sum is σ = 115245000. Its totient is φ = 35459952.

The previous prime is 66487439. The next prime is 66487489. The reversal of 66487455 is 55478466.

It is not a de Polignac number, because 66487455 - 2⁴ = 66487439 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1477499 = 66487455 / (6 + 6 + 4 + 8 + 7 + 4 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 66487455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 738705 + ... + 738794.

It is an arithmetic number, because the mean of its divisors is an integer number (9603750).

Almost surely, 2^66487455 is an apocalyptic number.

66487455 is a deficient number, since it is larger than the sum of its proper divisors (48757545).

66487455 is a wasteful number, since it uses less digits than its factorization.

66487455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477510 (or 1477507 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 66487455 is about 8153.9839955693. The cubic root of 66487455 is about 405.1164731306.

The spelling of 66487455 in words is "sixty-six million, four hundred eighty-seven thousand, four hundred fifty-five".