66153655551 has 8 divisors (see below), whose sum is σ = 93393396144. Its totient is φ = 41508176000.

The previous prime is 66153655549. The next prime is 66153655571. The reversal of 66153655551 is 15555635166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66153655551 - 2¹ = 66153655549 is a prime.

It is a super-2 number, since 2×66153655551² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66153655551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66153655571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648565200 + ... + 648565301.

It is an arithmetic number, because the mean of its divisors is an integer number (11674174518).

Almost surely, 2^66153655551 is an apocalyptic number.

66153655551 is a deficient number, since it is larger than the sum of its proper divisors (27239740593).

66153655551 is a wasteful number, since it uses less digits than its factorization.

66153655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297130521.

The product of its digits is 2025000, while the sum is 48.

The spelling of 66153655551 in words is "sixty-six billion, one hundred fifty-three million, six hundred fifty-five thousand, five hundred fifty-one".