1660630398 has 32 divisors (see below), whose sum is σ = 3796934400. Its totient is φ = 474314880.

The previous prime is 1660630357. The next prime is 1660630399. The reversal of 1660630398 is 8930360661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660630399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254278 + ... + 260726.

It is an arithmetic number, because the mean of its divisors is an integer number (118654200).

Almost surely, 2^1660630398 is an apocalyptic number.

1660630398 is an abundant number, since it is smaller than the sum of its proper divisors (2136304002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660630398 is a wasteful number, since it uses less digits than its factorization.

1660630398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 1660630398 is about 40750.8330957785. The cubic root of 1660630398 is about 1184.1980124259.

The spelling of 1660630398 in words is "one billion, six hundred sixty million, six hundred thirty thousand, three hundred ninety-eight".