670765536 has 144 divisors (see below), whose sum is σ = 2260911744. Its totient is φ = 191631744.

The previous prime is 670765483. The next prime is 670765541. The reversal of 670765536 is 635567076.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 670765491 and 670765500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48271 + ... + 60593.

It is an arithmetic number, because the mean of its divisors is an integer number (15700776).

Almost surely, 2^670765536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670765536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130455872).

670765536 is an abundant number, since it is smaller than the sum of its proper divisors (1590146208).

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

670765536 is a wasteful number, since it uses less digits than its factorization.

670765536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355 (or 12335 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The square root of 670765536 is about 25899.1416073970. The cubic root of 670765536 is about 875.3671541093.

The spelling of 670765536 in words is "six hundred seventy million, seven hundred sixty-five thousand, five hundred thirty-six".