661470146 has 8 divisors (see below), whose sum is σ = 992457360. Its totient is φ = 330651028.

The previous prime is 661470107. The next prime is 661470197. The reversal of 661470146 is 641074166.

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

It is a super-2 number, since 2×661470146² = 875085508098522632, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31676 + ... + 48231.

It is an arithmetic number, because the mean of its divisors is an integer number (124057170).

Almost surely, 2^661470146 is an apocalyptic number.

661470146 is a deficient number, since it is larger than the sum of its proper divisors (330987214).

661470146 is a wasteful number, since it uses less digits than its factorization.

661470146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84048.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 661470146 is about 25719.0619191292. The cubic root of 661470146 is about 871.3047520906.

The spelling of 661470146 in words is "six hundred sixty-one million, four hundred seventy thousand, one hundred forty-six".