66361364590 has 16 divisors (see below), whose sum is σ = 120792597840. Its totient is φ = 26246292160.

The previous prime is 66361364539. The next prime is 66361364599. The reversal of 66361364590 is 9546316366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66361364599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37280776 + ... + 37282555.

It is an arithmetic number, because the mean of its divisors is an integer number (7549537365).

Almost surely, 2^66361364590 is an apocalyptic number.

66361364590 is a deficient number, since it is larger than the sum of its proper divisors (54431233250).

66361364590 is a wasteful number, since it uses less digits than its factorization.

66361364590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74563427.

The product of its (nonzero) digits is 2099520, while the sum is 49.

The spelling of 66361364590 in words is "sixty-six billion, three hundred sixty-one million, three hundred sixty-four thousand, five hundred ninety".