66436458312 has 48 divisors (see below), whose sum is σ = 193208070960. Its totient is φ = 18981844896.

The previous prime is 66436458301. The next prime is 66436458317. The reversal of 66436458312 is 21385463466.

It is a super-2 number, since 2×66436458312² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66436458317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28245618 + ... + 28247969.

It is an arithmetic number, because the mean of its divisors is an integer number (4025168145).

Almost surely, 2^66436458312 is an apocalyptic number.

It is an amenable number.

66436458312 is an abundant number, since it is smaller than the sum of its proper divisors (126771612648).

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

66436458312 is a wasteful number, since it uses less digits than its factorization.

66436458312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56493610 (or 56493599 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 48.

The spelling of 66436458312 in words is "sixty-six billion, four hundred thirty-six million, four hundred fifty-eight thousand, three hundred twelve".