1660605673 has 8 divisors (see below), whose sum is σ = 1667590848. Its totient is φ = 1653631344.

The previous prime is 1660605641. The next prime is 1660605689. The reversal of 1660605673 is 3765060661.

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

It is a cyclic number.

It is not a de Polignac number, because 1660605673 - 2⁵ = 1660605641 is a prime.

It is a super-2 number, since 2×1660605673² = 5515222402399565858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660615673) 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, 456540 + ... + 460162.

It is an arithmetic number, because the mean of its divisors is an integer number (208448856).

Almost surely, 2^1660605673 is an apocalyptic number.

It is an amenable number.

1660605673 is a deficient number, since it is larger than the sum of its proper divisors (6985175).

1660605673 is a wasteful number, since it uses less digits than its factorization.

1660605673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 1660605673 is about 40750.5297266183. The cubic root of 1660605673 is about 1184.1921352520.

The spelling of 1660605673 in words is "one billion, six hundred sixty million, six hundred five thousand, six hundred seventy-three".