66151520755 has 16 divisors (see below), whose sum is σ = 81230221440. Its totient is φ = 51693380992.

The previous prime is 66151520731. The next prime is 66151520761. The reversal of 66151520755 is 55702515166.

It is a cyclic number.

It is not a de Polignac number, because 66151520755 - 2²³ = 66143132147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156904 + ... + 396133.

It is an arithmetic number, because the mean of its divisors is an integer number (5076888840).

Almost surely, 2^66151520755 is an apocalyptic number.

66151520755 is a deficient number, since it is larger than the sum of its proper divisors (15078700685).

66151520755 is a wasteful number, since it uses less digits than its factorization.

66151520755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553598.

The product of its (nonzero) digits is 315000, while the sum is 43.

The spelling of 66151520755 in words is "sixty-six billion, one hundred fifty-one million, five hundred twenty thousand, seven hundred fifty-five".