66151604 has 12 divisors (see below), whose sum is σ = 116036928. Its totient is φ = 32998200.

The previous prime is 66151577. The next prime is 66151609. The reversal of 66151604 is 40615166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66151609) 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, 17462 + ... + 20909.

It is an arithmetic number, because the mean of its divisors is an integer number (9669744).

Almost surely, 2^66151604 is an apocalyptic number.

It is an amenable number.

66151604 is a deficient number, since it is larger than the sum of its proper divisors (49885324).

66151604 is a wasteful number, since it uses less digits than its factorization.

66151604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38806 (or 38804 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66151604 is about 8133.3636338233. The cubic root of 66151604 is about 404.4331938016.

The spelling of 66151604 in words is "sixty-six million, one hundred fifty-one thousand, six hundred four".