1661973022 has 8 divisors (see below), whose sum is σ = 2495791872. Its totient is φ = 830042400.

The previous prime is 1661973017. The next prime is 1661973029. The reversal of 1661973022 is 2203791661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661973029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469854 + ... + 473377.

It is an arithmetic number, because the mean of its divisors is an integer number (311973984).

Almost surely, 2^1661973022 is an apocalyptic number.

1661973022 is a deficient number, since it is larger than the sum of its proper divisors (833818850).

1661973022 is an equidigital number, since it uses as much as digits as its factorization.

1661973022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944114.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1661973022 is about 40767.3033447149. The cubic root of 1661973022 is about 1184.5170688474.

The spelling of 1661973022 in words is "one billion, six hundred sixty-one million, nine hundred seventy-three thousand, twenty-two".