1662020155 has 8 divisors (see below), whose sum is σ = 2099394000. Its totient is φ = 1259636256.

The previous prime is 1662020153. The next prime is 1662020161. The reversal of 1662020155 is 5510202661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1662020155 - 2¹ = 1662020153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662020153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8747380 + ... + 8747569.

It is an arithmetic number, because the mean of its divisors is an integer number (262424250).

Almost surely, 2^1662020155 is an apocalyptic number.

1662020155 is a deficient number, since it is larger than the sum of its proper divisors (437373845).

1662020155 is a wasteful number, since it uses less digits than its factorization.

1662020155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17494973.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1662020155 is about 40767.8814141721. The cubic root of 1662020155 is about 1184.5282662444.

The spelling of 1662020155 in words is "one billion, six hundred sixty-two million, twenty thousand, one hundred fifty-five".