670370778 has 96 divisors (see below), whose sum is σ = 1838154240. Its totient is φ = 171499680.

The previous prime is 670370777. The next prime is 670370791. The reversal of 670370778 is 877073076.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (670370777) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89253 + ... + 96471.

It is an arithmetic number, because the mean of its divisors is an integer number (19147440).

Almost surely, 2^670370778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670370778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919077120).

670370778 is an abundant number, since it is smaller than the sum of its proper divisors (1167783462).

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

670370778 is a wasteful number, since it uses less digits than its factorization.

670370778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312 (or 7309 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The square root of 670370778 is about 25891.5194223900. The cubic root of 670370778 is about 875.1953971243.

The spelling of 670370778 in words is "six hundred seventy million, three hundred seventy thousand, seven hundred seventy-eight".