66626995 has 16 divisors (see below), whose sum is σ = 86628960. Its totient is φ = 48996864.

The previous prime is 66626969. The next prime is 66627023. The reversal of 66626995 is 59962666.

It is a cyclic number.

It is not a de Polignac number, because 66626995 - 2²⁵ = 33072563 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, 5460 + ... + 12769.

It is an arithmetic number, because the mean of its divisors is an integer number (5414310).

Almost surely, 2^66626995 is an apocalyptic number.

66626995 is a deficient number, since it is larger than the sum of its proper divisors (20001965).

66626995 is a wasteful number, since it uses less digits than its factorization.

66626995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18294.

The product of its digits is 1049760, while the sum is 49.

The square root of 66626995 is about 8162.5360642389. The cubic root of 66626995 is about 405.3996867155.

The spelling of 66626995 in words is "sixty-six million, six hundred twenty-six thousand, nine hundred ninety-five".