61397667 has 6 divisors (see below), whose sum is σ = 88685532. Its totient is φ = 40931772.

The previous prime is 61397663. The next prime is 61397671. The reversal of 61397667 is 76679316.

It is an interprime number because it is at equal distance from previous prime (61397663) and next prime (61397671).

It is not a de Polignac number, because 61397667 - 2² = 61397663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61397663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3410973 + ... + 3410990.

It is an arithmetic number, because the mean of its divisors is an integer number (14780922).

Almost surely, 2^61397667 is an apocalyptic number.

61397667 is a deficient number, since it is larger than the sum of its proper divisors (27287865).

61397667 is a wasteful number, since it uses less digits than its factorization.

61397667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821969 (or 6821966 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 61397667 is about 7835.6663405227. Note that the first 3 decimals coincide. The cubic root of 61397667 is about 394.5032841992.

The spelling of 61397667 in words is "sixty-one million, three hundred ninety-seven thousand, six hundred sixty-seven".