1660745722 has 8 divisors (see below), whose sum is σ = 2491374996. Its totient is φ = 830287392.

The previous prime is 1660745689. The next prime is 1660745741. The reversal of 1660745722 is 2275470661.

It can be written as a sum of positive squares in 2 ways, for example, as 1632240801 + 28504921 = 40401^2 + 5339^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14793 + ... + 59500.

Almost surely, 2^1660745722 is an apocalyptic number.

1660745722 is a deficient number, since it is larger than the sum of its proper divisors (830629274).

1660745722 is a wasteful number, since it uses less digits than its factorization.

1660745722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85472.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 1660745722 is about 40752.2480606899. The cubic root of 1660745722 is about 1184.2254243635.

The spelling of 1660745722 in words is "one billion, six hundred sixty million, seven hundred forty-five thousand, seven hundred twenty-two".