66670740040 has 32 divisors (see below), whose sum is σ = 150236856000. Its totient is φ = 26627817664.

The previous prime is 66670739977. The next prime is 66670740043. The reversal of 66670740040 is 4004707666.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 66670739975 and 66670740002.

It is not an unprimeable number, because it can be changed into a prime (66670740043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238260 + ... + 1290979.

It is an arithmetic number, because the mean of its divisors is an integer number (4694901750).

Almost surely, 2^66670740040 is an apocalyptic number.

It is an amenable number.

66670740040 is an abundant number, since it is smaller than the sum of its proper divisors (83566115960).

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

66670740040 is a wasteful number, since it uses less digits than its factorization.

66670740040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529909 (or 2529905 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 66670740040 in words is "sixty-six billion, six hundred seventy million, seven hundred forty thousand, forty".