661005148 has 12 divisors (see below), whose sum is σ = 1188023032. Its totient is φ = 321570000.

The previous prime is 661005131. The next prime is 661005181. The reversal of 661005148 is 841500166.

661005148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2232978 + ... + 2233273.

Almost surely, 2^661005148 is an apocalyptic number.

It is an amenable number.

661005148 is a deficient number, since it is larger than the sum of its proper divisors (527017884).

661005148 is a wasteful number, since it uses less digits than its factorization.

661005148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466292 (or 4466290 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 661005148 is about 25710.0203811666. The cubic root of 661005148 is about 871.1005352942.

The spelling of 661005148 in words is "six hundred sixty-one million, five thousand, one hundred forty-eight".