66151550 has 24 divisors (see below), whose sum is σ = 123406536. Its totient is φ = 26382240.

The previous prime is 66151541. The next prime is 66151571. The reversal of 66151550 is 5515166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16877 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (5141939).

Almost surely, 2^66151550 is an apocalyptic number.

66151550 is a deficient number, since it is larger than the sum of its proper divisors (57254986).

66151550 is a wasteful number, since it uses less digits than its factorization.

66151550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3932 (or 3927 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 66151550 is about 8133.3603141629. The cubic root of 66151550 is about 404.4330837544.

The spelling of 66151550 in words is "sixty-six million, one hundred fifty-one thousand, five hundred fifty".