66353805 has 48 divisors (see below), whose sum is σ = 139186944. Its totient is φ = 28546560.

The previous prime is 66353797. The next prime is 66353813. The reversal of 66353805 is 50835366.

It is an interprime number because it is at equal distance from previous prime (66353797) and next prime (66353813).

It is not a de Polignac number, because 66353805 - 2³ = 66353797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66353805.

It is a congruent number.

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, 841 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (2899728).

Almost surely, 2^66353805 is an apocalyptic number.

It is an amenable number.

66353805 is an abundant number, since it is smaller than the sum of its proper divisors (72833139).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66353805 is a wasteful number, since it uses less digits than its factorization.

66353805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12426 (or 12423 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 66353805 is about 8145.7844926072. The cubic root of 66353805 is about 404.8448422576.

It can be divided in two parts, 6635 and 3805, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 66353805 in words is "sixty-six million, three hundred fifty-three thousand, eight hundred five".