74720651 has 4 divisors (see below), whose sum is σ = 74942712. Its totient is φ = 74498592.

The previous prime is 74720641. The next prime is 74720677. The reversal of 74720651 is 15602747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15602747 = 71 ⋅219757.

It is a cyclic number.

It is not a de Polignac number, because 74720651 - 2⁶ = 74720587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74720641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110525 + ... + 111198.

It is an arithmetic number, because the mean of its divisors is an integer number (18735678).

Almost surely, 2^74720651 is an apocalyptic number.

74720651 is a deficient number, since it is larger than the sum of its proper divisors (222061).

74720651 is a wasteful number, since it uses less digits than its factorization.

74720651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222060.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 74720651 is about 8644.1107697669. The cubic root of 74720651 is about 421.1920988667.

The spelling of 74720651 in words is "seventy-four million, seven hundred twenty thousand, six hundred fifty-one".