80069661 has 16 divisors (see below), whose sum is σ = 135568000. Its totient is φ = 45753984.

The previous prime is 80069657. The next prime is 80069663. The reversal of 80069661 is 16696008.

It is not a de Polignac number, because 80069661 - 2² = 80069657 is a prime.

It is a super-2 number, since 2×80069661² = 12822301225309842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80069663) 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, 211636 + ... + 212013.

It is an arithmetic number, because the mean of its divisors is an integer number (8473000).

Almost surely, 2^80069661 is an apocalyptic number.

It is an amenable number.

80069661 is a deficient number, since it is larger than the sum of its proper divisors (55498339).

80069661 is a wasteful number, since it uses less digits than its factorization.

80069661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423665 (or 423659 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 80069661 is about 8948.1652309286. The cubic root of 80069661 is about 431.0119684519.

The spelling of 80069661 in words is "eighty million, sixty-nine thousand, six hundred sixty-one".