66675313953 has 24 divisors (see below), whose sum is σ = 101318443200. Its totient is φ = 42190019424.

The previous prime is 66675313937. The next prime is 66675313961. The reversal of 66675313953 is 35931357666.

It is not a de Polignac number, because 66675313953 - 2⁴ = 66675313937 is a prime.

It is a super-2 number, since 2×66675313953² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66675313953.

It is not an unprimeable number, because it can be changed into a prime (66675313153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2149525 + ... + 2180322.

It is an arithmetic number, because the mean of its divisors is an integer number (4221601800).

Almost surely, 2^66675313953 is an apocalyptic number.

It is an amenable number.

66675313953 is a deficient number, since it is larger than the sum of its proper divisors (34643129247).

66675313953 is a wasteful number, since it uses less digits than its factorization.

66675313953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329941 (or 4329938 counting only the distinct ones).

The product of its digits is 9185400, while the sum is 54.

It can be divided in two parts, 66675 and 313953, that added together give a triangular number (380628 = T₈₇₂).

The spelling of 66675313953 in words is "sixty-six billion, six hundred seventy-five million, three hundred thirteen thousand, nine hundred fifty-three".