61002066039 has 4 divisors (see below), whose sum is σ = 81336088056. Its totient is φ = 40668044024.

The previous prime is 61002066023. The next prime is 61002066061. The reversal of 61002066039 is 93066020016.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61002066039 - 2⁴ = 61002066023 is a prime.

It is a super-2 number, since 2×61002066039² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61002066079) 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, 10167011004 + ... + 10167011009.

It is an arithmetic number, because the mean of its divisors is an integer number (20334022014).

Almost surely, 2^61002066039 is an apocalyptic number.

61002066039 is a deficient number, since it is larger than the sum of its proper divisors (20334022017).

61002066039 is a wasteful number, since it uses less digits than its factorization.

61002066039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20334022016.

The product of its (nonzero) digits is 11664, while the sum is 33.

The spelling of 61002066039 in words is "sixty-one billion, two million, sixty-six thousand, thirty-nine".