66957055 has 32 divisors (see below), whose sum is σ = 91404288. Its totient is φ = 46646400.

The previous prime is 66957049. The next prime is 66957061. The reversal of 66957055 is 55075966.

It is an interprime number because it is at equal distance from previous prime (66957049) and next prime (66957061).

It is not a de Polignac number, because 66957055 - 2⁷ = 66956927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294852 + ... + 295078.

It is an arithmetic number, because the mean of its divisors is an integer number (2856384).

Almost surely, 2^66957055 is an apocalyptic number.

66957055 is a deficient number, since it is larger than the sum of its proper divisors (24447233).

66957055 is a wasteful number, since it uses less digits than its factorization.

66957055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 283500, while the sum is 43.

The square root of 66957055 is about 8182.7290679821. The cubic root of 66957055 is about 406.0680137943.

The spelling of 66957055 in words is "sixty-six million, nine hundred fifty-seven thousand, fifty-five".