1665074412 has 36 divisors (see below), whose sum is σ = 4210454976. Its totient is φ = 554824800.

The previous prime is 1665074377. The next prime is 1665074417. The reversal of 1665074412 is 2144705661.

1665074412 is a `hidden beast` number, since 166 + 50 + 7 + 441 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (1665074417) 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, 120037 + ... + 133187.

Almost surely, 2^1665074412 is an apocalyptic number.

1665074412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665074412 is an abundant number, since it is smaller than the sum of its proper divisors (2545380564).

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

1665074412 is a wasteful number, since it uses less digits than its factorization.

1665074412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16678 (or 16673 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1665074412 is about 40805.3233291932. The cubic root of 1665074412 is about 1185.2534158659.

The spelling of 1665074412 in words is "one billion, six hundred sixty-five million, seventy-four thousand, four hundred twelve".