1671997774 has 8 divisors (see below), whose sum is σ = 2508345360. Its totient is φ = 835882656.

The previous prime is 1671997763. The next prime is 1671997807. The reversal of 1671997774 is 4777991761.

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

It is a super-3 number, since 3×1671997774³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38859 + ... + 69670.

It is an arithmetic number, because the mean of its divisors is an integer number (313543170).

Almost surely, 2^1671997774 is an apocalyptic number.

1671997774 is a deficient number, since it is larger than the sum of its proper divisors (836347586).

1671997774 is a wasteful number, since it uses less digits than its factorization.

1671997774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116234.

The product of its digits is 4667544, while the sum is 58.

The square root of 1671997774 is about 40890.0693812080. The cubic root of 1671997774 is about 1186.8939013599.

The spelling of 1671997774 in words is "one billion, six hundred seventy-one million, nine hundred ninety-seven thousand, seven hundred seventy-four".