66151516 has 12 divisors (see below), whose sum is σ = 115953040. Its totient is φ = 33022080.

The previous prime is 66151507. The next prime is 66151517. The reversal of 66151516 is 61515166.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66151517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10581 + ... + 15628.

Almost surely, 2^66151516 is an apocalyptic number.

It is an amenable number.

66151516 is a deficient number, since it is larger than the sum of its proper divisors (49801524).

66151516 is a wasteful number, since it uses less digits than its factorization.

66151516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26844 (or 26842 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 66151516 is about 8133.3582240056. The cubic root of 66151516 is about 404.4330144654.

The spelling of 66151516 in words is "sixty-six million, one hundred fifty-one thousand, five hundred sixteen".