75620081 has 4 divisors (see below), whose sum is σ = 78227700. Its totient is φ = 73012464.

The previous prime is 75620071. The next prime is 75620087. The reversal of 75620081 is 18002657.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49773025 + 25847056 = 7055^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 75620081 - 2¹⁰ = 75619057 is a prime.

It is a super-2 number, since 2×75620081² = 11436793300893122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 2607589 = 75620081 / (7 + 5 + 6 + 2 + 0 + 0 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75620087) 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, 1303766 + ... + 1303823.

It is an arithmetic number, because the mean of its divisors is an integer number (19556925).

Almost surely, 2^75620081 is an apocalyptic number.

It is an amenable number.

75620081 is a deficient number, since it is larger than the sum of its proper divisors (2607619).

75620081 is a wasteful number, since it uses less digits than its factorization.

75620081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607618.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 75620081 is about 8695.9807382491. The cubic root of 75620081 is about 422.8753589180.

The spelling of 75620081 in words is "seventy-five million, six hundred twenty thousand, eighty-one".