30978751066 has 16 divisors (see below), whose sum is σ = 46975559904. Its totient is φ = 15320682864.

The previous prime is 30978751051. The next prime is 30978751117. The reversal of 30978751066 is 66015787903.

It is a super-2 number, since 2×30978751066² (a number of 22 digits) contains 22 as substring.

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, 25036 + ... + 250168.

It is an arithmetic number, because the mean of its divisors is an integer number (2935972494).

Almost surely, 2^30978751066 is an apocalyptic number.

30978751066 is a deficient number, since it is larger than the sum of its proper divisors (15996808838).

30978751066 is a wasteful number, since it uses less digits than its factorization.

30978751066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225885.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 30978751066 in words is "thirty billion, nine hundred seventy-eight million, seven hundred fifty-one thousand, sixty-six".