65674921 has 16 divisors (see below), whose sum is σ = 71971200. Its totient is φ = 59923344.

The previous prime is 65674877. The next prime is 65674949. The reversal of 65674921 is 12947656.

It is not a de Polignac number, because 65674921 - 2¹⁵ = 65642153 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65674321) 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, 366810 + ... + 366988.

It is an arithmetic number, because the mean of its divisors is an integer number (4498200).

Almost surely, 2^65674921 is an apocalyptic number.

It is an amenable number.

65674921 is a deficient number, since it is larger than the sum of its proper divisors (6296279).

65674921 is a wasteful number, since it uses less digits than its factorization.

65674921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 359 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 65674921 is about 8104.0064782797. The cubic root of 65674921 is about 403.4594136417.

The spelling of 65674921 in words is "sixty-five million, six hundred seventy-four thousand, nine hundred twenty-one".