1661075948 has 12 divisors (see below), whose sum is σ = 3322151952. Its totient is φ = 711889680.

The previous prime is 1661075917. The next prime is 1661075951. The reversal of 1661075948 is 8495701661.

1661075948 is an admirable 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, 29662043 + ... + 29662098.

It is an arithmetic number, because the mean of its divisors is an integer number (276845996).

Almost surely, 2^1661075948 is an apocalyptic number.

It is an amenable number.

1661075948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661075948 is a wasteful number, since it uses less digits than its factorization.

1661075948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59324152 (or 59324150 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1661075948 is about 40756.2994885453. The cubic root of 1661075948 is about 1184.3039104120.

The spelling of 1661075948 in words is "one billion, six hundred sixty-one million, seventy-five thousand, nine hundred forty-eight".