66190851 has 40 divisors (see below), whose sum is σ = 106722000. Its totient is φ = 40746240.

The previous prime is 66190823. The next prime is 66190867. The reversal of 66190851 is 15809166.

It is not a de Polignac number, because 66190851 - 2⁵ = 66190819 is a prime.

It is a super-2 number, since 2×66190851² = 8762457512208402, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (66190351) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62575 + ... + 63623.

It is an arithmetic number, because the mean of its divisors is an integer number (2668050).

Almost surely, 2^66190851 is an apocalyptic number.

66190851 is a deficient number, since it is larger than the sum of its proper divisors (40531149).

66190851 is a wasteful number, since it uses less digits than its factorization.

66190851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 66190851 is about 8135.7759924914. The cubic root of 66190851 is about 404.5131598724.

The spelling of 66190851 in words is "sixty-six million, one hundred ninety thousand, eight hundred fifty-one".