66676635 has 48 divisors (see below), whose sum is σ = 125992800. Its totient is φ = 33449472.

The previous prime is 66676613. The next prime is 66676657. The reversal of 66676635 is 53667666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66676613) and next prime (66676657).

It is not a de Polignac number, because 66676635 - 2⁷ = 66676507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38161 + ... + 39869.

It is an arithmetic number, because the mean of its divisors is an integer number (2624850).

Almost surely, 2^66676635 is an apocalyptic number.

66676635 is a deficient number, since it is larger than the sum of its proper divisors (59316165).

66676635 is a wasteful number, since it uses less digits than its factorization.

66676635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757 (or 1734 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 66676635 is about 8165.5762197165. The cubic root of 66676635 is about 405.5003418367.

The spelling of 66676635 in words is "sixty-six million, six hundred seventy-six thousand, six hundred thirty-five".