66070864 has 10 divisors (see below), whose sum is σ = 128012330. Its totient is φ = 33035424.

The previous prime is 66070831. The next prime is 66070877. The reversal of 66070864 is 46807066.

It can be written as a sum of positive squares in only one way, i.e., 62536464 + 3534400 = 7908^2 + 1880^2 .

It is a zygodrome in base 4.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064699 + ... + 2064730.

It is an arithmetic number, because the mean of its divisors is an integer number (12801233).

Almost surely, 2^66070864 is an apocalyptic number.

It is an amenable number.

66070864 is a deficient number, since it is larger than the sum of its proper divisors (61941466).

66070864 is a wasteful number, since it uses less digits than its factorization.

66070864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129437 (or 4129431 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 66070864 is about 8128.3986122729. The cubic root of 66070864 is about 404.2685859003.

It can be divided in two parts, 6 and 6070864, that added together give a triangular number (6070870 = T₃₄₈₄).

The spelling of 66070864 in words is "sixty-six million, seventy thousand, eight hundred sixty-four".