66494412 has 48 divisors (see below), whose sum is σ = 182538720. Its totient is φ = 20860416.

The previous prime is 66494399. The next prime is 66494423. The reversal of 66494412 is 21449466.

66494412 is a `hidden beast` number, since 6 + 649 + 4 + 4 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16273 + ... + 19944.

It is an arithmetic number, because the mean of its divisors is an integer number (3802890).

Almost surely, 2^66494412 is an apocalyptic number.

It is an amenable number.

66494412 is an abundant number, since it is smaller than the sum of its proper divisors (116044308).

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

66494412 is a wasteful number, since it uses less digits than its factorization.

66494412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36247 (or 36239 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 66494412 is about 8154.4105856892. The cubic root of 66494412 is about 405.1306025981.

The spelling of 66494412 in words is "sixty-six million, four hundred ninety-four thousand, four hundred twelve".