1656678338 has 16 divisors (see below), whose sum is σ = 2897980800. Its totient is φ = 710004708.

The previous prime is 1656678319. The next prime is 1656678379. The reversal of 1656678338 is 8338766561.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1656678338.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206806 + ... + 1208177.

It is an arithmetic number, because the mean of its divisors is an integer number (181123800).

Almost surely, 2^1656678338 is an apocalyptic number.

1656678338 is a deficient number, since it is larger than the sum of its proper divisors (1241302462).

1656678338 is an equidigital number, since it uses as much as digits as its factorization.

1656678338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415006 (or 2414992 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 1656678338 is about 40702.3136688813. The cubic root of 1656678338 is about 1183.2578595960.

The spelling of 1656678338 in words is "one billion, six hundred fifty-six million, six hundred seventy-eight thousand, three hundred thirty-eight".