1663307970 has 16 divisors (see below), whose sum is σ = 3991939200. Its totient is φ = 443548784.

The previous prime is 1663307939. The next prime is 1663308001. The reversal of 1663307970 is 797033661.

It is an interprime number because it is at equal distance from previous prime (1663307939) and next prime (1663308001).

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, 27721770 + ... + 27721829.

It is an arithmetic number, because the mean of its divisors is an integer number (249496200).

Almost surely, 2^1663307970 is an apocalyptic number.

1663307970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1663307970 is an abundant number, since it is smaller than the sum of its proper divisors (2328631230).

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

1663307970 is a wasteful number, since it uses less digits than its factorization.

1663307970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55443609.

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 1663307970 is about 40783.6728360750. The cubic root of 1663307970 is about 1184.8341308545.

The spelling of 1663307970 in words is "one billion, six hundred sixty-three million, three hundred seven thousand, nine hundred seventy".