66303636242 has 4 divisors (see below), whose sum is σ = 99455454366. Its totient is φ = 33151818120.

The previous prime is 66303636241. The next prime is 66303636271. The reversal of 66303636242 is 24263630366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24263630366 = 2 ⋅12131815183.

It can be written as a sum of positive squares in only one way, i.e., 45937777561 + 20365858681 = 214331^2 + 142709^2 .

It is a super-2 number, since 2×66303636242² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66303636242.

It is not an unprimeable number, because it can be changed into a prime (66303636241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16575909059 + ... + 16575909062.

Almost surely, 2^66303636242 is an apocalyptic number.

66303636242 is a deficient number, since it is larger than the sum of its proper divisors (33151818124).

66303636242 is a wasteful number, since it uses less digits than its factorization.

66303636242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33151818123.

The product of its (nonzero) digits is 559872, while the sum is 41.

The spelling of 66303636242 in words is "sixty-six billion, three hundred three million, six hundred thirty-six thousand, two hundred forty-two".