66693552 has 40 divisors (see below), whose sum is σ = 176499120. Its totient is φ = 21688320.

The previous prime is 66693547. The next prime is 66693563. The reversal of 66693552 is 25539666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14977 + ... + 18912.

It is an arithmetic number, because the mean of its divisors is an integer number (4412478).

Almost surely, 2^66693552 is an apocalyptic number.

It is an amenable number.

66693552 is an abundant number, since it is smaller than the sum of its proper divisors (109805568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66693552 is a wasteful number, since it uses less digits than its factorization.

66693552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33941 (or 33935 counting only the distinct ones).

The product of its digits is 291600, while the sum is 42.

The square root of 66693552 is about 8166.6120270281. The cubic root of 66693552 is about 405.5346330553.

The spelling of 66693552 in words is "sixty-six million, six hundred ninety-three thousand, five hundred fifty-two".