66030655551 has 24 divisors (see below), whose sum is σ = 102431705904. Its totient is φ = 37725609600.

The previous prime is 66030655547. The next prime is 66030655571. The reversal of 66030655551 is 15555603066.

It is not a de Polignac number, because 66030655551 - 2² = 66030655547 is a prime.

It is a super-2 number, since 2×66030655551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66030655571) 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, 951531 + ... + 1018563.

It is an arithmetic number, because the mean of its divisors is an integer number (4267987746).

Almost surely, 2^66030655551 is an apocalyptic number.

66030655551 is a deficient number, since it is larger than the sum of its proper divisors (36401050353).

66030655551 is a wasteful number, since it uses less digits than its factorization.

66030655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73751 (or 73744 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 42.

The spelling of 66030655551 in words is "sixty-six billion, thirty million, six hundred fifty-five thousand, five hundred fifty-one".