670505740 has 12 divisors (see below), whose sum is σ = 1408062096. Its totient is φ = 268202288.

The previous prime is 670505701. The next prime is 670505747. The reversal of 670505740 is 47505076.

It is a super-3 number, since 3×670505740³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 670505696 and 670505705.

It is not an unprimeable number, because it can be changed into a prime (670505747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16762624 + ... + 16762663.

It is an arithmetic number, because the mean of its divisors is an integer number (117338508).

Almost surely, 2^670505740 is an apocalyptic number.

It is an amenable number.

670505740 is an abundant number, since it is smaller than the sum of its proper divisors (737556356).

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

670505740 is a wasteful number, since it uses less digits than its factorization.

670505740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33525296 (or 33525294 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 670505740 is about 25894.1255886350. The cubic root of 670505740 is about 875.2541259151.

The spelling of 670505740 in words is "six hundred seventy million, five hundred five thousand, seven hundred forty".