66898363 has 16 divisors (see below), whose sum is σ = 77898240. Its totient is φ = 56270016.

The previous prime is 66898357. The next prime is 66898367. The reversal of 66898363 is 36389866.

It is a cyclic number.

It is not a de Polignac number, because 66898363 - 2¹³ = 66890171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66898367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103720 + ... + 104362.

It is an arithmetic number, because the mean of its divisors is an integer number (4868640).

Almost surely, 2^66898363 is an apocalyptic number.

66898363 is a deficient number, since it is larger than the sum of its proper divisors (10999877).

66898363 is a wasteful number, since it uses less digits than its factorization.

66898363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its digits is 1119744, while the sum is 49.

The square root of 66898363 is about 8179.1419476617. The cubic root of 66898363 is about 405.9493312002.

The spelling of 66898363 in words is "sixty-six million, eight hundred ninety-eight thousand, three hundred sixty-three".