1606605701 has 4 divisors (see below), whose sum is σ = 1606737504. Its totient is φ = 1606473900.

The previous prime is 1606605691. The next prime is 1606605703. The reversal of 1606605701 is 1075066061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1606605701 - 2¹⁴ = 1606589317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606605703) 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, 45515 + ... + 72696.

It is an arithmetic number, because the mean of its divisors is an integer number (401684376).

Almost surely, 2^1606605701 is an apocalyptic number.

It is an amenable number.

1606605701 is a deficient number, since it is larger than the sum of its proper divisors (131803).

1606605701 is a wasteful number, since it uses less digits than its factorization.

1606605701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131802.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1606605701 is about 40082.4862128087. The cubic root of 1606605701 is about 1171.2144841498.

The spelling of 1606605701 in words is "one billion, six hundred six million, six hundred five thousand, seven hundred one".