2061668402 has 8 divisors (see below), whose sum is σ = 3093858156. Its totient is φ = 1030382352.

The previous prime is 2061668369. The next prime is 2061668407. The reversal of 2061668402 is 2048661602.

It can be written as a sum of positive squares in 2 ways, for example, as 1981941361 + 79727041 = 44519^2 + 8929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2061668407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220193 + ... + 229364.

Almost surely, 2^2061668402 is an apocalyptic number.

2061668402 is a deficient number, since it is larger than the sum of its proper divisors (1032189754).

2061668402 is a wasteful number, since it uses less digits than its factorization.

2061668402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451852.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 2061668402 is about 45405.5987957432. The cubic root of 2061668402 is about 1272.7397406110.

The spelling of 2061668402 in words is "two billion, sixty-one million, six hundred sixty-eight thousand, four hundred two".