66937961635 has 16 divisors (see below), whose sum is σ = 87794157312. Its totient is φ = 48774528000.

The previous prime is 66937961537. The next prime is 66937961653. The reversal of 66937961635 is 53616973966.

It is not a de Polignac number, because 66937961635 - 2¹³ = 66937953443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12699066 + ... + 12704335.

It is an arithmetic number, because the mean of its divisors is an integer number (5487134832).

Almost surely, 2^66937961635 is an apocalyptic number.

66937961635 is a deficient number, since it is larger than the sum of its proper divisors (20856195677).

66937961635 is a wasteful number, since it uses less digits than its factorization.

66937961635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25403454.

The product of its digits is 33067440, while the sum is 61.

The spelling of 66937961635 in words is "sixty-six billion, nine hundred thirty-seven million, nine hundred sixty-one thousand, six hundred thirty-five".