66065661155 has 32 divisors (see below), whose sum is σ = 87428968704. Its totient is φ = 47620094976.

The previous prime is 66065661131. The next prime is 66065661223. The reversal of 66065661155 is 55116656066.

It is a cyclic number.

It is not a de Polignac number, because 66065661155 - 2⁶ = 66065661091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1110527 + ... + 1168503.

It is an arithmetic number, because the mean of its divisors is an integer number (2732155272).

Almost surely, 2^66065661155 is an apocalyptic number.

66065661155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66065661155 is a deficient number, since it is larger than the sum of its proper divisors (21363307549).

66065661155 is a wasteful number, since it uses less digits than its factorization.

66065661155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58415.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 66065661155 in words is "sixty-six billion, sixty-five million, six hundred sixty-one thousand, one hundred fifty-five".