287671666 has 16 divisors (see below), whose sum is σ = 456854400. Its totient is φ = 135474768.

The previous prime is 287671663. The next prime is 287671673. The reversal of 287671666 is 666176782.

It is not an unprimeable number, because it can be changed into a prime (287671663) 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, 15306 + ... + 28453.

It is an arithmetic number, because the mean of its divisors is an integer number (28553400).

Almost surely, 2^287671666 is an apocalyptic number.

287671666 is a deficient number, since it is larger than the sum of its proper divisors (169182734).

287671666 is a wasteful number, since it uses less digits than its factorization.

287671666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43953.

The product of its digits is 1016064, while the sum is 49.

The square root of 287671666 is about 16960.8863565558. The cubic root of 287671666 is about 660.1343971791.

It can be divided in two parts, 2876716 and 66, that added together give a palindrome (2876782).

The spelling of 287671666 in words is "two hundred eighty-seven million, six hundred seventy-one thousand, six hundred sixty-six".