66703887 has 24 divisors (see below), whose sum is σ = 101836800. Its totient is φ = 41987088.

The previous prime is 66703877. The next prime is 66703891. The reversal of 66703887 is 78830766.

It is not a de Polignac number, because 66703887 - 2¹¹ = 66701839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14314 + ... + 18392.

It is an arithmetic number, because the mean of its divisors is an integer number (4243200).

Almost surely, 2^66703887 is an apocalyptic number.

66703887 is a deficient number, since it is larger than the sum of its proper divisors (35132913).

66703887 is a wasteful number, since it uses less digits than its factorization.

66703887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187 (or 4184 counting only the distinct ones).

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

The square root of 66703887 is about 8167.2447618521. The cubic root of 66703887 is about 405.5555795278. Note that the first 4 decimals are identical.

The spelling of 66703887 in words is "sixty-six million, seven hundred three thousand, eight hundred eighty-seven".