1661417602 has 16 divisors (see below), whose sum is σ = 2687844600. Its totient is φ = 765660672.

The previous prime is 1661417591. The next prime is 1661417629. The reversal of 1661417602 is 2067141661.

It can be written as a sum of positive squares in 4 ways, for example, as 694269801 + 967147801 = 26349^2 + 31099^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29977 + ... + 64972.

Almost surely, 2^1661417602 is an apocalyptic number.

1661417602 is a deficient number, since it is larger than the sum of its proper divisors (1026426998).

1661417602 is a wasteful number, since it uses less digits than its factorization.

1661417602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95637.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1661417602 is about 40760.4906987146. The cubic root of 1661417602 is about 1184.3851016485.

The spelling of 1661417602 in words is "one billion, six hundred sixty-one million, four hundred seventeen thousand, six hundred two".