1662694272 has 48 divisors (see below), whose sum is σ = 4784579280. Its totient is φ = 554231040.

The previous prime is 1662694261. The next prime is 1662694301. The reversal of 1662694272 is 2724962661.

1662694272 is a `hidden beast` number, since 16 + 626 + 9 + 4 + 2 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 720504 + ... + 722807.

It is an arithmetic number, because the mean of its divisors is an integer number (99678735).

Almost surely, 2^1662694272 is an apocalyptic number.

1662694272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1662694272 is an abundant number, since it is smaller than the sum of its proper divisors (3121885008).

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

1662694272 is a wasteful number, since it uses less digits than its factorization.

1662694272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443331 (or 1443316 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1662694272 is about 40776.1483222729. The cubic root of 1662694272 is about 1184.6883932048.

The spelling of 1662694272 in words is "one billion, six hundred sixty-two million, six hundred ninety-four thousand, two hundred seventy-two".