670754157065 has 16 divisors (see below), whose sum is σ = 810940520592. Its totient is φ = 532581187584.

The previous prime is 670754157061. The next prime is 670754157077. The reversal of 670754157065 is 560751457076.

It can be written as a sum of positive squares in 8 ways, for example, as 41886124921 + 628868032144 = 204661^2 + 793012^2 .

It is a cyclic number.

It is not a de Polignac number, because 670754157065 - 2² = 670754157061 is a prime.

It is a super-2 number, since 2×670754157065² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 670754156998 and 670754157016.

It is not an unprimeable number, because it can be changed into a prime (670754157061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3465737 + ... + 3654153.

It is an arithmetic number, because the mean of its divisors is an integer number (50683782537).

Almost surely, 2^670754157065 is an apocalyptic number.

It is an amenable number.

670754157065 is a deficient number, since it is larger than the sum of its proper divisors (140186363527).

670754157065 is a wasteful number, since it uses less digits than its factorization.

670754157065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193756.

The product of its (nonzero) digits is 6174000, while the sum is 53.

The spelling of 670754157065 in words is "six hundred seventy billion, seven hundred fifty-four million, one hundred fifty-seven thousand, sixty-five".