74665651 has 2 divisors, whose sum is σ = 74665652. Its totient is φ = 74665650.

The previous prime is 74665609. The next prime is 74665663. The reversal of 74665651 is 15656647.

It is a strong prime.

It is an emirp because it is prime and its reverse (15656647) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74665651 - 2²¹ = 72568499 is a prime.

It is not a weakly prime, because it can be changed into another prime (74665601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37332825 + 37332826.

It is an arithmetic number, because the mean of its divisors is an integer number (37332826).

Almost surely, 2^74665651 is an apocalyptic number.

74665651 is a deficient number, since it is larger than the sum of its proper divisors (1).

74665651 is an equidigital number, since it uses as much as digits as its factorization.

74665651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 74665651 is about 8640.9288273889. The cubic root of 74665651 is about 421.0887305149.

The spelling of 74665651 in words is "seventy-four million, six hundred sixty-five thousand, six hundred fifty-one".