66157207352 has 16 divisors (see below), whose sum is σ = 125249083440. Its totient is φ = 32757451776.

The previous prime is 66157207349. The next prime is 66157207387. The reversal of 66157207352 is 25370275166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40143113 + ... + 40144760.

It is an arithmetic number, because the mean of its divisors is an integer number (7828067715).

Almost surely, 2^66157207352 is an apocalyptic number.

It is an amenable number.

66157207352 is a deficient number, since it is larger than the sum of its proper divisors (59091876088).

66157207352 is a wasteful number, since it uses less digits than its factorization.

66157207352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80287982 (or 80287978 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 66157207352 in words is "sixty-six billion, one hundred fifty-seven million, two hundred seven thousand, three hundred fifty-two".