661470148 has 24 divisors (see below), whose sum is σ = 1171485504. Its totient is φ = 326776800.

The previous prime is 661470107. The next prime is 661470197. The reversal of 661470148 is 841074166.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 178353 + ... + 182023.

It is an arithmetic number, because the mean of its divisors is an integer number (48811896).

Almost surely, 2^661470148 is an apocalyptic number.

It is an amenable number.

661470148 is a deficient number, since it is larger than the sum of its proper divisors (510015356).

661470148 is a wasteful number, since it uses less digits than its factorization.

661470148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203 (or 4201 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 661470148 is about 25719.0619580108. The cubic root of 661470148 is about 871.3047529688.

The spelling of 661470148 in words is "six hundred sixty-one million, four hundred seventy thousand, one hundred forty-eight".