66263436 has 18 divisors (see below), whose sum is σ = 167499332. Its totient is φ = 22087800.

The previous prime is 66263419. The next prime is 66263441. The reversal of 66263436 is 63436266.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1840651 = 66263436 / (6 + 6 + 2 + 6 + 3 + 4 + 3 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66263436.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 920290 + ... + 920361.

Almost surely, 2^66263436 is an apocalyptic number.

It is an amenable number.

66263436 is an abundant number, since it is smaller than the sum of its proper divisors (101235896).

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

66263436 is a wasteful number, since it uses less digits than its factorization.

66263436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840661 (or 1840656 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 66263436 is about 8140.2356231254. The cubic root of 66263436 is about 404.6609691298.

The spelling of 66263436 in words is "sixty-six million, two hundred sixty-three thousand, four hundred thirty-six".