1661235354 has 12 divisors (see below), whose sum is σ = 3599343306. Its totient is φ = 553745112.

The previous prime is 1661235353. The next prime is 1661235403. The reversal of 1661235354 is 4535321661.

1661235354 is a `hidden beast` number, since 1 + 6 + 612 + 3 + 5 + 35 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1607609025 + 53626329 = 40095^2 + 7323^2 .

It is not an unprimeable number, because it can be changed into a prime (1661235353) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46145409 + ... + 46145444.

Almost surely, 2^1661235354 is an apocalyptic number.

1661235354 is an abundant number, since it is smaller than the sum of its proper divisors (1938107952).

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

1661235354 is a wasteful number, since it uses less digits than its factorization.

1661235354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92290861 (or 92290858 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1661235354 is about 40758.2550411570. The cubic root of 1661235354 is about 1184.3417933097.

The spelling of 1661235354 in words is "one billion, six hundred sixty-one million, two hundred thirty-five thousand, three hundred fifty-four".