66940995 has 16 divisors (see below), whose sum is σ = 116842752. Its totient is φ = 32456160.

The previous prime is 66940969. The next prime is 66941041. The reversal of 66940995 is 59904966.

It is a happy number.

It is not a de Polignac number, because 66940995 - 2⁵ = 66940963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202687 + ... + 203016.

It is an arithmetic number, because the mean of its divisors is an integer number (7302672).

Almost surely, 2^66940995 is an apocalyptic number.

66940995 is a deficient number, since it is larger than the sum of its proper divisors (49901757).

66940995 is a wasteful number, since it uses less digits than its factorization.

66940995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405722.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 66940995 is about 8181.7476739386. The cubic root of 66940995 is about 406.0355453522.

The spelling of 66940995 in words is "sixty-six million, nine hundred forty thousand, nine hundred ninety-five".