66881379030 has 32 divisors (see below), whose sum is σ = 160952707584. Its totient is φ = 17786434656.

The previous prime is 66881379029. The next prime is 66881379101. The reversal of 66881379030 is 3097318866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3026292 + ... + 3048311.

It is an arithmetic number, because the mean of its divisors is an integer number (5029772112).

Almost surely, 2^66881379030 is an apocalyptic number.

66881379030 is an abundant number, since it is smaller than the sum of its proper divisors (94071328554).

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

66881379030 is a wasteful number, since it uses less digits than its factorization.

66881379030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074980.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 66881379030 in words is "sixty-six billion, eight hundred eighty-one million, three hundred seventy-nine thousand, thirty".