1661010512 has 40 divisors (see below), whose sum is σ = 3777365376. Its totient is φ = 692620416.

The previous prime is 1661010511. The next prime is 1661010523. The reversal of 1661010512 is 2150101661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661010511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196268 + ... + 204555.

Almost surely, 2^1661010512 is an apocalyptic number.

It is an amenable number.

1661010512 is an abundant number, since it is smaller than the sum of its proper divisors (2116354864).

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

1661010512 is a wasteful number, since it uses less digits than its factorization.

1661010512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400875 (or 400869 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1661010512 is about 40755.4967090330. The cubic root of 1661010512 is about 1184.2883588196.

The spelling of 1661010512 in words is "one billion, six hundred sixty-one million, ten thousand, five hundred twelve".