66153907 has 4 divisors (see below), whose sum is σ = 68287936. Its totient is φ = 64019880.

The previous prime is 66153883. The next prime is 66153943. The reversal of 66153907 is 70935166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66153907 - 2¹¹ = 66151859 is a prime.

It is a super-2 number, since 2×66153907² = 8752678822729298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66153977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066968 + ... + 1067029.

It is an arithmetic number, because the mean of its divisors is an integer number (17071984).

Almost surely, 2^66153907 is an apocalyptic number.

66153907 is a deficient number, since it is larger than the sum of its proper divisors (2134029).

66153907 is a wasteful number, since it uses less digits than its factorization.

66153907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134028.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 66153907 is about 8133.5052099326. The cubic root of 66153907 is about 404.4378870556.

The spelling of 66153907 in words is "sixty-six million, one hundred fifty-three thousand, nine hundred seven".