66060511651615 has 32 divisors (see below), whose sum is σ = 91741440853440. Its totient is φ = 45228273260544.

The previous prime is 66060511651591. The next prime is 66060511651633. The reversal of 66060511651615 is 51615611506066.

It is a cyclic number.

It is not a de Polignac number, because 66060511651615 - 2⁷ = 66060511651487 is a prime.

It is a super-2 number, since 2×66060511651615² (a number of 28 digits) contains 22 as substring.

It is a congruent 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, 446069760 + ... + 446217829.

It is an arithmetic number, because the mean of its divisors is an integer number (2866920026670).

Almost surely, 2^{66060511651615} is an apocalyptic number.

66060511651615 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66060511651615 is a deficient number, since it is larger than the sum of its proper divisors (25680929201825).

66060511651615 is a wasteful number, since it uses less digits than its factorization.

66060511651615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892287691.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 66060511651615 in words is "sixty-six trillion, sixty billion, five hundred eleven million, six hundred fifty-one thousand, six hundred fifteen".