66315225142536 has 32 divisors (see below), whose sum is σ = 165790823487360. Its totient is φ = 22104706963392.

The previous prime is 66315225142493. The next prime is 66315225142553. The reversal of 66315225142536 is 63524152251366.

It is a super-2 number, since 2×66315225142536² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21532000 + ... + 24418383.

It is an arithmetic number, because the mean of its divisors is an integer number (5180963233980).

Almost surely, 2^{66315225142536} is an apocalyptic number.

It is an amenable number.

66315225142536 is an abundant number, since it is smaller than the sum of its proper divisors (99475598344824).

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

66315225142536 is a wasteful number, since it uses less digits than its factorization.

66315225142536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46010525 (or 46010521 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 66315225142536 in words is "sixty-six trillion, three hundred fifteen billion, two hundred twenty-five million, one hundred forty-two thousand, five hundred thirty-six".