66786014970 has 128 divisors (see below), whose sum is σ = 181630874880. Its totient is φ = 17456774400.

The previous prime is 66786014863. The next prime is 66786014993. The reversal of 66786014970 is 7941068766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23424045 + ... + 23426895.

It is an arithmetic number, because the mean of its divisors is an integer number (1418991210).

Almost surely, 2^66786014970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66786014970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90815437440).

66786014970 is an abundant number, since it is smaller than the sum of its proper divisors (114844859910).

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

66786014970 is a wasteful number, since it uses less digits than its factorization.

66786014970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557 (or 4551 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 66786014970 in words is "sixty-six billion, seven hundred eighty-six million, fourteen thousand, nine hundred seventy".