1662120156 has 24 divisors (see below), whose sum is σ = 3972873744. Its totient is φ = 540526720.

The previous prime is 1662120127. The next prime is 1662120169. The reversal of 1662120156 is 6510212661.

It is a congruent number.

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, 1688655 + ... + 1689638.

It is an arithmetic number, because the mean of its divisors is an integer number (165536406).

Almost surely, 2^1662120156 is an apocalyptic number.

It is an amenable number.

1662120156 is an abundant number, since it is smaller than the sum of its proper divisors (2310753588).

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

1662120156 is a wasteful number, since it uses less digits than its factorization.

1662120156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378341 (or 3378339 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1662120156 is about 40769.1078636754. The cubic root of 1662120156 is about 1184.5520228026.

The spelling of 1662120156 in words is "one billion, six hundred sixty-two million, one hundred twenty thousand, one hundred fifty-six".