1661057548 has 6 divisors (see below), whose sum is σ = 2906850716. Its totient is φ = 830528772.

The previous prime is 1661057543. The next prime is 1661057551. The reversal of 1661057548 is 8457501661.

It is a super-2 number, since 2×1661057548² = 5518224355535544608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1661057543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207632190 + ... + 207632197.

Almost surely, 2^1661057548 is an apocalyptic number.

It is an amenable number.

1661057548 is a deficient number, since it is larger than the sum of its proper divisors (1245793168).

1661057548 is a wasteful number, since it uses less digits than its factorization.

1661057548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415264391 (or 415264389 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1661057548 is about 40756.0737559446. The cubic root of 1661057548 is about 1184.2995374889.

The spelling of 1661057548 in words is "one billion, six hundred sixty-one million, fifty-seven thousand, five hundred forty-eight".