66051636 has 24 divisors (see below), whose sum is σ = 176137920. Its totient is φ = 18871872.

The previous prime is 66051611. The next prime is 66051637. The reversal of 66051636 is 63615066.

It is a junction number, because it is equal to n+sod(n) for n = 66051597 and 66051606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393081 + ... + 393248.

It is an arithmetic number, because the mean of its divisors is an integer number (7339080).

Almost surely, 2^66051636 is an apocalyptic number.

It is an amenable number.

66051636 is an abundant number, since it is smaller than the sum of its proper divisors (110086284).

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

66051636 is a wasteful number, since it uses less digits than its factorization.

66051636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786343 (or 786341 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66051636 is about 8127.2157594099. The cubic root of 66051636 is about 404.2293652308.

The spelling of 66051636 in words is "sixty-six million, fifty-one thousand, six hundred thirty-six".