66149797 has 8 divisors (see below), whose sum is σ = 76881600. Its totient is φ = 55738464.

The previous prime is 66149749. The next prime is 66149819. The reversal of 66149797 is 79794166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66149797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66149797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66149717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79672 + ... + 80497.

It is an arithmetic number, because the mean of its divisors is an integer number (9610200).

Almost surely, 2^66149797 is an apocalyptic number.

It is an amenable number.

66149797 is a deficient number, since it is larger than the sum of its proper divisors (10731803).

66149797 is a wasteful number, since it uses less digits than its factorization.

66149797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160235.

The product of its digits is 571536, while the sum is 49.

The square root of 66149797 is about 8133.2525474130. The cubic root of 66149797 is about 404.4295112634.

The spelling of 66149797 in words is "sixty-six million, one hundred forty-nine thousand, seven hundred ninety-seven".