66515161370 has 32 divisors (see below), whose sum is σ = 136881360000. Its totient is φ = 22796836416.

The previous prime is 66515161327. The next prime is 66515161457. The reversal of 66515161370 is 7316151566.

It is a happy number.

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, 19601 + ... + 365259.

It is an arithmetic number, because the mean of its divisors is an integer number (4277542500).

Almost surely, 2^66515161370 is an apocalyptic number.

66515161370 is an abundant number, since it is smaller than the sum of its proper divisors (70366198630).

66515161370 is a wasteful number, since it uses less digits than its factorization.

66515161370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348422.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 66515161370 in words is "sixty-six billion, five hundred fifteen million, one hundred sixty-one thousand, three hundred seventy".