1660397254 has 16 divisors (see below), whose sum is σ = 2552479776. Its totient is φ = 809588800.

The previous prime is 1660397243. The next prime is 1660397257. The reversal of 1660397254 is 4527930661.

It is a self number, because there is not a number n which added to its sum of digits gives 1660397254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660397257) 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, 338439 + ... + 343309.

It is an arithmetic number, because the mean of its divisors is an integer number (159529986).

Almost surely, 2^1660397254 is an apocalyptic number.

1660397254 is a deficient number, since it is larger than the sum of its proper divisors (892082522).

1660397254 is a wasteful number, since it uses less digits than its factorization.

1660397254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9071.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 1660397254 is about 40747.9723912737. The cubic root of 1660397254 is about 1184.1425913876.

The spelling of 1660397254 in words is "one billion, six hundred sixty million, three hundred ninety-seven thousand, two hundred fifty-four".