61266636 has 18 divisors (see below), whose sum is σ = 154868532. Its totient is φ = 20422200.

The previous prime is 61266617. The next prime is 61266643. The reversal of 61266636 is 63666216.

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: 1701851 = 61266636 / (6 + 1 + 2 + 6 + 6 + 6 + 3 + 6).

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

It is a self number, because there is not a number n which added to its sum of digits gives 61266636.

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, 850890 + ... + 850961.

Almost surely, 2^61266636 is an apocalyptic number.

It is an amenable number.

61266636 is an abundant number, since it is smaller than the sum of its proper divisors (93601896).

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

61266636 is a wasteful number, since it uses less digits than its factorization.

61266636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701861 (or 1701856 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 61266636 is about 7827.3006841439. The cubic root of 61266636 is about 394.2224430385. Note that the first 3 decimals are identical.

The spelling of 61266636 in words is "sixty-one million, two hundred sixty-six thousand, six hundred thirty-six".