161678662 has 8 divisors (see below), whose sum is σ = 248433192. Its totient is φ = 78867600.

The previous prime is 161678659. The next prime is 161678681. The reversal of 161678662 is 266876161.

It is a happy number.

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

It is a super-2 number, since 2×161678662² = 52279979492220488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985764 + ... + 985927.

It is an arithmetic number, because the mean of its divisors is an integer number (31054149).

Almost surely, 2^161678662 is an apocalyptic number.

161678662 is a deficient number, since it is larger than the sum of its proper divisors (86754530).

161678662 is a wasteful number, since it uses less digits than its factorization.

161678662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971734.

The product of its digits is 145152, while the sum is 43.

The square root of 161678662 is about 12715.2924464992. The cubic root of 161678662 is about 544.7755010607.

The spelling of 161678662 in words is "one hundred sixty-one million, six hundred seventy-eight thousand, six hundred sixty-two".