66670440704 has 36 divisors (see below), whose sum is σ = 152091946944. Its totient is φ = 28573045248.

The previous prime is 66670440559. The next prime is 66670440713. The reversal of 66670440704 is 40704407666.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18600452 + ... + 18604035.

It is an arithmetic number, because the mean of its divisors is an integer number (4224776304).

Almost surely, 2^66670440704 is an apocalyptic number.

66670440704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66670440704 is an abundant number, since it is smaller than the sum of its proper divisors (85421506240).

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

66670440704 is an equidigital number, since it uses as much as digits as its factorization.

66670440704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37204510 (or 37204496 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 66670440704 in words is "sixty-six billion, six hundred seventy million, four hundred forty thousand, seven hundred four".